Re: Boot loop TP-Link Archer C9 v1 (Europe)
Nice job! Glad you got it working after so much work. (Sorry it turned out to be something like a psu. lol)
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Re: Boot loop TP-Link Archer C9 v1 (Europe)
damn power supplies... After reading post 7, I wanted to say "check the PSU"... glad you got it resolved though.Leave a comment:
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Re: Boot loop TP-Link Archer C9 v1 (Europe)
It was never a firmware or a memory issue. The problem was due to the current draw of the wireless chip at boot.
The power supply is rated at 9V with 0.6A, but during the router startup the current reached 0.8A, the voltage of the power supply dropped well below 9V (aprox 3.5V).
I’ve managed to boot up the router and upgrade with the latest firmware using a lab power supply.
Next steps:
-modify the WAN MAC address with the one on the label
-open the TP-Link power supply to see some bulging capacitorsLast edited by metalrise; 09-17-2018, 04:46 PM.Leave a comment:
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Re: Boot loop TP-Link Archer C9 v1 (Europe)
After "====>>>>startup: start ok!", the router reboots itself, and the startup process in repeatedCode:wl1: wlc_iovar_op: BCME -20 (Bad Channel) wl1: wlc_ampdu_tx_set: AGG Mode = MAC+AQM txmaxpkts 1024 wl1: wlc_enable_probe_req: state down, deferring setting of host flags acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: selected channel spec: 0x100b acsd: Adjusted channel spec: 0x100b acsd: selected DFS-exit channel spec: 0x100b acsd: selected channel spec: 0x100b acsd: Adjusted channel spec: 0x100b acsd: selected channel spec: 0x100b acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: scan in progress ... acsd: selected channel spec: 0xe09b acsd: Adjusted channel spec: 0xe09b acsd: selected DFS-exit channel spec: 0xe09b acsd: selected channel spec: 0xe09b acsd: Adjusted channel spec: 0xe09b acsd: selected channel spec: 0xe09b wl0: link up (eth1) wl1: link up (eth2) ====>>>>task[6151]: start ok! ====>>>>startup: start ok!Leave a comment:
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Re: Boot loop TP-Link Archer C9 v1 (Europe)
Code:Device eth0: hwaddr 00-90-4C-11-20-01, ipaddr 192.168.1.1, mask 255.255.255.0 gateway not set, nameserver not set Loader:raw Filesys:raw Dev:flash0.os File: Options:(null) Loading: .... 4232512 bytes read Entry at 0x00008000 Closing network. Starting program at 0x00008000 console [ttyS0] enabled, bootconsole disabled serial8250.0: ttyS1 at MMIO 0x18000400 (irq = 117) is a 16550 brd: module loaded loop: module loaded pflash: found no supported devices bcmsflash: squash filesystem found at block 36 Creating 5 MTD partitions on "bcmsflash": 0x000000000000-0x000000040000 : "boot" 0x000000040000-0x000000240000 : "linux" 0x000000240000-0x000000ee0000 : "rootfs" 0x000000fe0000-0x000000ff0000 : "radio" 0x000000ff0000-0x000001000000 : "nvram" nflash: found no supported devices PPP generic driver version 2.4.2 NET: Registered protocol family 24 usbmon: debugfs is not available ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver ehci_hcd 0000:00:0b.1: EHCI Host Controller ehci_hcd 0000:00:0b.1: new USB bus registered, assigned bus number 1 ehci_hcd 0000:00:0b.1: irq 111, io mem 0x18021000 ehci_hcd 0000:00:0b.1: USB 0.0 started, EHCI 1.00 hub 1-0:1.0: USB hub found hub 1-0:1.0: 2 ports detected ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver ohci_hcd 0000:00:0b.0: OHCI Host Controller ohci_hcd 0000:00:0b.0: new USB bus registered, assigned bus number 2 ohci_hcd 0000:00:0b.0: irq 111, io mem 0x18022000 hub 2-0:1.0: USB hub found hub 2-0:1.0: 2 ports detected xhci_hcd 0000:00:0c.0: xHCI Host Controller xhci_hcd 0000:00:0c.0: new USB bus registered, assigned bus number 3 xhci_hcd 0000:00:0c.0: irq 112, io mem 0x18023000 xhci_hcd 0000:00:0c.0: Failed to enable MSI-X xhci_hcd 0000:00:0c.0: failed to allocate MSI entry usb usb3: No SuperSpeed endpoint companion for config 1 interface 0 altsetting 0 ep 129: using minimum values xHCI xhci_add_endpoint called for root hub xHCI xhci_check_bandwidth called for root hub hub 3-0:1.0: USB hub found hub 3-0:1.0: 1 port detected nf_conntrack version 0.5.0 (1960 buckets, 7840 max) ip_tables: (C) 2000-2006 Netfilter Core Team TCP cubic registered NET: Registered protocol family 10 NET: Registered protocol family 17 802.1Q VLAN Support v1.8 Ben Greear <greearb@candelatech.com> All bugs added by David S. Miller <davem@redhat.com> Northstar brcmnand NAND Flash Controller driver, Version 0.1 (c) Broadcom Inc. 2012 brcmnand: found no supported devices VFS: Mounted root (squashfs filesystem) readonly on device 31:2. Freeing init memory: 216K init started: BusyBox v1.01 (2014.11.12-04:38+0000) multi-call binary This board use 2.6.36 ctf: module license 'Proprietary' taints kernel. Disabling lock debugging due to kernel taint et_module_init: passivemode set to 0x0 et_module_init: txworkq set to 0x0 et_module_init: et_txq_thresh set to 0x0 si_doattach: incoming bus is PCI but it's a lie, switching to SI devid:0x4715 Found chip type NAI (0x3f00cf12) Chipc: rev 42, caps 0x48000a, chipst 0x0 pmurev 0, pmucaps 0x0 eth0: Broadcom BCM47XX 10/100/1000 Mbps Ethernet Controller 6.37.14.93 (r469350) xt_time: kernel timezone is -0000 u32 classifier Actions configured L2TP core driver, V2.0 PPPoL2TP kernel driver, V2.0 PPTP driver version 0.8.3 (none) armv7l #1 SMP PREEMPT Wed Nov 12 12:33:55 CST 2014 (none) (none) login: ====>>>>@@@@@@size is 49340@@@@@@ start uclited ====>>>>*****total size is 49340****** check size inited device eth0.1 entered promiscuous mode device eth0 entered promiscuous mode br0: port 1(eth0.1) entering forwarding state br0: port 1(eth0.1) entering forwarding state Attempt to kill tasklet from interrupt device eth0 left promiscuous mode br0: port 1(eth0.1) entering forwarding state device eth0 entered promiscuous mode br0: port 1(eth0.1) entering forwarding state br0: port 1(eth0.1) entering forwarding state br0: port 1(eth0.1) entering forwarding state br0: port 1(eth0.1) entering forwarding state br0: port 1(eth0.1) entering forwarding state device eth0 left promiscuous mode br0: port 1(eth0.1) entering forwarding state device eth0 entered promiscuous mode br0: port 1(eth0.1) entering forwarding state br0: port 1(eth0.1) entering forwarding state checkSizeThread 457 1 49340 49340 ====>>>>DHCP start.dhcpc.c,dhcpcStart,1100 ====>>>>DHCP end.dhcpc.c,dhcpcStart,1164 nf_conntrack_rtsp v0.6.21 loading nf_nat_rtsp v0.6.21 loading ====>>>>hasBeenCalibrated: recover rftest items form radio wl_module_init: msglevel set to 0x1 wl_module_init: msglevel2 set to 0x0 wl_module_init: phymsglevel set to 0x1 wl_module_init: passivemode set to 0x0 wl_module_init: txworkq set to 0x0 Found chip type AI (0x15134360) Chipc: rev 43, caps 0x58680001, chipst 0x9a6d pmurev 17, pmucaps 0x10a22b11 srom rev:0 HTAVAIL is set, so not updating BBPLL Frequency Changing rsrc 6 res_updn_timer to 0x100001 wl0: wlc_attach: Overriding device id: 0x43a1 instead of 0x4360 Overriding device id = 0x43a1 wl0: wlc_bmac_phy_reset: band not yet set wlc_bmac_attach, deviceid 0x43a1 nbands 1 wl0: wlc_bmac_phy_reset: band not yet set wl0: wlc_bmac_attach: chiprev 3 corerev 42 cccap 0x58680001 maccap 0x30518c05 band 2.4G, phy_type 11 phy_rev 1 wl0: wlc_stf_txcore_shmem_write: No clock wl0: wlc_ampdu_tx_set: AGG Mode = MAC+AQM txmaxpkts 1024 wl0: online cpus 2 eth1: Broadcom BCM4360 802.11 Wireless Controller 6.37.14.93 (r469350 WLTEST) (Compiled in . at 12:35:49 on Nov 12 2014) Found chip type AI (0x15134360) Chipc: rev 43, caps 0x58680001, chipst 0x9a6d pmurev 17, pmucaps 0x10a22b11 srom rev:0 Overriding boardvendor: 0x14e4 instead of 0x14e4 HTAVAIL is set, so not updating BBPLL Frequency Changing rsrc 6 res_updn_timer to 0x100001 wl1: wlc_attach: Overriding device id: 0x43a2 instead of 0x4360 Overriding device id = 0x43a2 wl1: wlc_bmac_phy_reset: band not yet set wlc_bmac_attach, deviceid 0x43a2 nbands 1 wl1: wlc_bmac_phy_reset: band not yet set wl1: wlc_bmac_attach: chiprev 3 corerev 42 cccap 0x58680001 maccap 0x30518c05 band 5G, phy_type 11 phy_rev 1 wl1: wlc_stf_txcore_shmem_write: No clock wl1: wlc_ampdu_tx_set: AGG Mode = MAC+AQM txmaxpkts 1024 wl1: online cpus 2 eth2: Broadcom BCM4360 802.11 Wireless Controller 6.37.14.93 (r469350 WLTEST) (Compiled in . at 12:35:49 on Nov 12 2014) device eth1 entered promiscuous mode Changing rsrc 6 res_updn_timer to 0x100001 wl0: wlc_enable_probe_req: state down, deferring setting of host flags br0: port 2(eth1) entering forwarding state br0: port 2(eth1) entering forwarding state ====>>>>start: eth1. wl0: wlc_iovar_op: BCME -20 (Bad Channel) wl0: wlc_ampdu_tx_set: AGG Mode = MAC+AQM txmaxpkts 1024 wl0: wlc_enable_probe_req: state down, deferring setting of host flags device eth2 entered promiscuous mode Changing rsrc 6 res_updn_timer to 0x100001 wl1: wlc_enable_probe_req: state down, deferring setting of host flags br0: port 3(eth2) entering forwarding state br0: port 3(eth2) entering forwarding state ====>>>>start: eth2.Leave a comment:
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Re: Boot loop TP-Link Archer C9 v1 (Europe)
Serial boot log
Code:Digital core power voltage set to 1.0V Decompressing...done CFE version 6.37.14.93 (r469350) based on BBP 1.0.37 for BCM947XX (32bit,SP,) Build Date: Wed Nov 4 09:11:46 CST 2015 (root@jji315) Copyright (C) 2000-2008 Broadcom Corporation. Init Arena Init Devs. Boot partition size = 262144(0x40000) DDR Clock: 400 MHz Info: DDR frequency set from clkfreq=1000,*800* Warning: invalid DDR setting of 800 MHz ignored. DDR frequency will be set to 400 MHz. et0: Broadcom BCM47XX 10/100/1000 Mbps Ethernet Controller 6.37.14.93 (r469350) CPU type 0x0: 1000MHz Tot mem: 131072 KBytes CFE mem: 0x00F00000 - 0x02F80F74 (34082676) Data: 0x00F48C54 - 0x00F49128 (1236) BSS: 0x00F49138 - 0x00F7EF74 (220732) Heap: 0x00F7EF74 - 0x02F7EF74 (33554432) Stack: 0x02F7EF74 - 0x02F80F74 (8192) Text: 0x00F00000 - 0x00F3F398 (258968) Committing NVRAM...done Waiting for reset button release...donDigital core power voltage set to 1.0V Decompressing...done Digital core power voltage set to 1.0V SHMOO VER 1.13 PKID07DC06011801080000000000001A103F01000000 S300001BF 00001200 RDLYW0 00000004 RDENW0 00000028 RDQSW0 0000000000111111111122222222223333333333444444444455555555556666 0123456789012345678901234567890123456789012345678901234567890123 00 -------+++++++++++++++++++++++X++++++++++++++++++++++----------- 01 ----------++++++++++++++++++++++++X+++++++++++++++++++++++------ 02 -----------+++++++++++++++++++++X+++++++++++++++++++++---------- 03 ------++++++++++++++++++++++++X++++++++++++++++++++++++--------- 04 ----+++++++++++++++++++++++X++++++++++++++++++++++-------------- 05 --------++++++++++++++++++++++++X++++++++++++++++++++++++------- 06 -----+++++++++++++++++++++++X+++++++++++++++++++++++------------ 07 ----------++++++++++++++++++++++++X+++++++++++++++++++++++------ 08 ----+++++++++++++++++++++++X+++++++++++++++++++++++------------- 09 ------++++++++++++++++++++++++X++++++++++++++++++++++++--------- 10 --++++++++++++++++++++++++X+++++++++++++++++++++++-------------- 11 ------++++++++++++++++++++++++X+++++++++++++++++++++++---------- 12 ---+++++++++++++++++++++++X+++++++++++++++++++++++-------------- 13 -------++++++++++++++++++++++++X+++++++++++++++++++++++--------- 14 ------++++++++++++++++++++++X++++++++++++++++++++++------------- 15 -------++++++++++++++++++++++++X+++++++++++++++++++++++--------- PW0 0000000000111111111122222222223333333333444444444455555555556666 0123456789012345678901234567890123456789012345678901234567890123 00 -----++++++++++++++++++++++++X+++++++++++++++++++++++----------- 01 ------++++++++++++++++++++++++++X++++++++++++++++++++++++++----- 02 -------++++++++++++++++++++++++X+++++++++++++++++++++++--------- 03 ---++++++++++++++++++++++++++X+++++++++++++++++++++++++--------- 04 +++++++++++++++++++++++++X++++++++++++++++++++++++-------------- 05 ----++++++++++++++++++++++++++X++++++++++++++++++++++++++------- 06 --+++++++++++++++++++++++++X++++++++++++++++++++++++------------ 07 -----++++++++++++++++++++++++++X++++++++++++++++++++++++++------ 08 -+++++++++++++++++++++++++X++++++++++++++++++++++++------------- 09 --++++++++++++++++++++++++++X+++++++++++++++++++++++++---------- 10 +++++++++++++++++++++++++X++++++++++++++++++++++++-------------- 11 ---+++++++++++++++++++++++++X+++++++++++++++++++++++++---------- 12 +++++++++++++++++++++++++X++++++++++++++++++++++++-------------- 13 ----++++++++++++++++++++++++++X+++++++++++++++++++++++++-------- 14 ---++++++++++++++++++++++++X+++++++++++++++++++++++------------- 15 ----++++++++++++++++++++++++++X+++++++++++++++++++++++++-------- NW0 0000000000111111111122222222223333333333444444444455555555556666 0123456789012345678901234567890123456789012345678901234567890123 00 -------++++++++++++++++++++++X++++++++++++++++++++++------------ 01 -----------+++++++++++++++++++++++X+++++++++++++++++++++++------ 02 ----------++++++++++++++++++++++X+++++++++++++++++++++---------- 03 ------+++++++++++++++++++++++++X++++++++++++++++++++++++-------- 04 -----++++++++++++++++++++++X++++++++++++++++++++++-------------- 05 --------++++++++++++++++++++++++X+++++++++++++++++++++++-------- 06 -----+++++++++++++++++++++++X+++++++++++++++++++++++------------ 07 ----------++++++++++++++++++++++++X+++++++++++++++++++++++------ 08 ----++++++++++++++++++++++++X+++++++++++++++++++++++------------ 09 ------++++++++++++++++++++++++X+++++++++++++++++++++++---------- 10 ---++++++++++++++++++++++++X+++++++++++++++++++++++------------- 11 ------++++++++++++++++++++++++X++++++++++++++++++++++++--------- 12 --+++++++++++++++++++++++++X++++++++++++++++++++++++------------ 13 ------++++++++++++++++++++++++X++++++++++++++++++++++++--------- 14 ------+++++++++++++++++++++++X++++++++++++++++++++++------------ 15 --------+++++++++++++++++++++++X+++++++++++++++++++++++--------- WRDQW0 0000000000111111111122222222223333333333444444444455555555556666 0123456789012345678901234567890123456789012345678901234567890123 00 ++++++++++++++++++++++X++++++++++++++++++++++------++++++++++++- 01 +++++++++++++++++++++++X++++++++++++++++++++++-------++++++++++- 02 +++++++++++++++++++++++X++++++++++++++++++++++-------++++++++++- 03 +++++++++++++++++++++++X++++++++++++++++++++++-----++++++++++++- 04 ++++++++++++++++++++X+++++++++++++++++++------------+++++++++++- 05 +++++++++++++++++++++++X++++++++++++++++++++++------+++++++++++- 06 ++++++++++++++++++++X++++++++++++++++++++-----------+++++++++++- 07 +++++++++++++++++++++++X++++++++++++++++++++++-----++++++++++++- 08 ++++++++++++++++++++X++++++++++++++++++++-----------+++++++++++- 09 ++++++++++++++++++++++X++++++++++++++++++++++------++++++++++++- 10 ++++++++++++++++++++X++++++++++++++++++++----------++++++++++++- 11 ++++++++++++++++++++++X++++++++++++++++++++++-------+++++++++++- 12 +++++++++++++++++++++X++++++++++++++++++++---------++++++++++++- 13 +++++++++++++++++++++++X+++++++++++++++++++++++-------+++++++++- 14 ++++++++++++++++++++++X++++++++++++++++++++++------++++++++++++- 15 +++++++++++++++++++++++X++++++++++++++++++++++-------++++++++++- WRDMW0 00000022 WRDMW0 00000021 ADDR 0000000000111111111122222222223333333333444444444455555555556666 0123456789012345678901234567890123456789012345678901234567890123 00 ++++++++++++++++++S++++++++++++X++++++++++++++++++++++++++++++++ Decompressing...done CFE version 6.37.14.93 (r469350) based on BBP 1.0.37 for BCM947XX (32bit,SP,) Build Date: Wed Nov 4 09:11:46 CST 2015 (root@jji315) Copyright (C) 2000-2008 Broadcom Corporation. Init Arena Init Devs. Boot partition size = 262144(0x40000) DDR Clock: 800 MHz Info: DDR frequency set from clkfreq=1000,*800* et0: Broadcom BCM47XX 10/100/1000 Mbps Ethernet Controller 6.37.14.93 (r469350) CPU type 0x0: 1000MHz Tot mem: 131072 KBytes CFE mem: 0x00F00000 - 0x02F80F74 (34082676) Data: 0x00F48C54 - 0x00F49128 (1236) BSS: 0x00F49138 - 0x00F7EF74 (220732) Heap: 0x00F7EF74 - 0x02F7EF74 (33554432) Stack: 0x02F7EF74 - 0x02F80F74 (8192) Text: 0x00F00000 - 0x00F3F398 (258968)
Leave a comment:
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Re: Boot loop TP-Link Archer C9 v1 (Europe)
Managed to hook up the serial console and erased the nvram
Code:CFE> nvram erase *** command status = 0
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Re: Boot loop TP-Link Archer C9 v1 (Europe)
How?
With the original firmware uploaded via tftpd or with ch341a, the router its stuck in the boot loop.
For every attempt I've tried to hold hold the reset button to clear the settings.Leave a comment:
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Re: Boot loop TP-Link Archer C9 v1 (Europe)
I didn't look at these links, but did you try to clear the NVRAM yet?Leave a comment:
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Boot loop TP-Link Archer C9 v1 (Europe)
Boot loop TP-Link Archer C9 v1 (Europe)
Hello,
I have a TP-Link Archer C9 v1 that is stuck in a boot loop after beeing unplug for 2 weeks. The symptom is: the power LED is blinking, after a few seconds all the leds are on, afterwards the all the led are off and power LED is again blinking.
What I tried with no success:
1) UNBRICK/Recovery TP-Link Archer C9 WIFI Router Without A Serial Connection How To (The tutorial posted by Richard Lloyd)
https://www.youtube.com/watch?v=AU8RyW82Z2M
Same symptoms using the c9v1_un-up-ver4-1-0-P31[20160517-rel35411].bin from the TP Link Archer C9 V1 Europe support page
2) UNBRICK/Recovery TP-Link Archer C9 Router (Version 1) Step-By-Step Guide Using Serial/USB Connection (The tutorial posted by Richard Lloyd)
https://www.youtube.com/watch?v=fme7kwTkttk
Again, the same symptoms using flash0.trx and mtd3.bin posted in the description section
3) Flashing the memory
Tools used:
CH341A (Black version) moded for 3.3V
The dump posted by Heinz on the Polish TP-Link forum (https://tplinkforum.pl/t/archer-c9-v1/8191)
After removing the heatsink I observed that instead of having a Spansion FL128SAIF00 serial flash memory, on the board it was a WinBond 25Q128FVFG serial flash memory.
Even with this surprise, i continued to desolder the memory.
1st attempt
Programming with CH341A programmer software v1.29
-erase, write, verify, saved the bin and compared with C9-factoryFullFlash.bin, all ok, no errors or differences in the bin files.
Result: the same symptom
2nd attempt
On CentOS 7 with flashrom
-erase, write, verify the memory with C9-factoryFullFlash.bin, all ok no errors.
Result: the same symptom
For both attempts the memory was written outside the PCB and resoldered after each flashing.
Now the weird part, if I flash with the latest stable OpenWRT build via tftpd, the router starts. WAN ok, LAN OK, USB ports ok, except for the wireless because the router has a Broadcom radio.
Basically I've run out of ideas how the make the router function with the original firmware, any help/suggestion will be appreciated.Last edited by metalrise; 09-16-2018, 09:02 AM.
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Hello all... TV started boot looping. Opened the back panel and tried to isolate the problem. Just PSB no boot loop. PSB and MB no boot loop. Plug in the LVDS from panel to MB and boot looping starts up. It doesnt matter of order that I plug the LVDS ribbons back in, only 1 and no boot loop but as soon as 2nd one plugs in boot looping. I then noticed a flicker on the screen when I was closing the clip on the harness to the LVDS. Shut the lights off so I can see better, and I noticed as i slowly close it, I will get a picture, but as soon as it clips in, I lose picture and booting happens. So I... -
Samsung QLED QN50Q — purchased 2022 started experiencing a delay in the picture coming on in the morning less than 2 years later. Did not know the term boot loop at that time. As the loop delay ran into a few minutes did all the recommended troubleshooting, soft and hard reset, changing cables and outlet locations, no help. As the delay increased contacted Samsung tech group and allow them remote access the tv. Tech was moving too fast to see exactly what he was doing but this ultimately it was also no help. Lived with the delay until it stretched out over 6 hours. Pulled of off the back cover... -
Less than a year out of warranty, samsung UE49MU6105K craps out, they've got this designed obsolescence down to an exact science of self destruct when out of warranty...
Screen started to show horizontal lines and ghosted image at the bottom, then turned off by itself. Did software update, to no avail of the line problem, and got a boot loop after some minutes of watching TV. This boot loop will turn on the backlights for some seconds the sound comes on, the image will turn dark very fast and then it reboots again. Pressing power button will not put it on standby. Disconnecting... -
Hi Team - just joined to see if anyone can offer some expertise in diagnosing an issue with a TV.
I've done a few hours googling and youtubing but just seeing if anyone has any insight here. I got a 55" Samsung UE55MU6470U which seems to boot loop and then after 10 mins will boot, work for a few minutes, then turn off and repeat.
Whilst it's on into the normal Samsung menu/boot screen it looks perfect - so I can't see there being any screen issues. I've seen lots of videos with taping across clock lines to diagnose which particular one may be an issue but i don't... -
Hey everyone,
Usually, I'm not the type to ask for help, but this time, I'm calling on your wisdom and expertise
I've seen what this community can do, so I'm pretty sure you guys can help me out.
Here's the deal: I noticed my MacBook got stuck in a boot loop. After opening it up and doing some initial troubleshooting, I found that the boot loop stops only when the trackpad is unplugged.
Now, just so you know, the trackpad actually works — I tested it with another motherboard and it's all good. Same for the cable, no issues there. The problem is only...
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