Emboldened by an easy experience using my new T48 to remove bios password from a used machine of the same model (thanks badcaps), I ordered an ‘as-is’ HP 800 G6 Mini thinking it might be an easy fix. Now it looks like the bios chip has been removed and soldered back already, so I think I might be wasting my time with this board - someone more skilled has already tried…
Anyway, the fans spin up on this guy and there are a couple LEDs on the board, but there is no other sign of life. No video, no beep pattern, no keyboard. Since there’s so little feedback, I’m feeling out...
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04-06-2024, 02:09 PM
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by Radio FoxI'm repairing an Acer AL1916 monitor PSU at the moment. The 400v high voltage smoothing capacitor C114 is measuring completely O/C. The case of U101 has blown apart. Fuse F101 has blown. ZD121 reads 6 Ohms in both directions & ZD120 reads 99 Ohms in both directions. While looking at the data sheet of U101 (DM0565R), I noticed that the absolute maximum voltage for Vcc is 20v. However, the zener diode across the Vcc pin to GND is a 1N4748A (22v).
Now, whether that zener is used to constantly regulate the voltage, or whether its's used to protect the Vcc voltage from rising too high,...1 Photo-
Channel: Troubleshooting Computer Displays
04-13-2024, 06:32 AM -
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by pavithraI have 50 Chinese constant current isolated LED drivers based on LC6685 IC. 35 drivers are working fine, but there is a slight flickering in the rest of the drivers.
I have checked the output with oscilloscope and found that there is a slight random voltage fluctuation.
Is it possible to get the datasheet of LC6685 IC?
Also highly appreciate if you could let me know what could go wrong....1 PhotoToday, 02:46 AM -
by shlomim412Hello
working on a2141 macbook, board number 820-01700 which has no wifi\bt and also no connection with LAN cable.
initial visual inspection the board looks good no visible corrosion or damage.
i found that PP3V3_G3S_X is shorted to ground (around 1.5ohm short)
and also PP3V3_GS3_WLAN i shorted to ground (same ohm reading, around 1.5ohm).
the board is working but no WIFI\BT as i mentioned.
with the usb c cable connected for measurement i noticed U8215 i getting EXTREMELY HOT
so i pulled it out figuring it might be causing the...Yesterday, 01:18 PM -
by arecki09Hi!
Model: Lenovo L14 gen 2
CPU: SRK04 i5-1135G7
Board: HL4A0/HL5A0 Rev. 1.0
Laptop no boot, no react on power button. Power supply switch on 20V but consume only 0,11A. Electric i cannot found problem.
Probably problem with bios
Original bios in att.
Please help!...-
Channel: BIOS Requests ONLY!
Yesterday, 12:59 PM -
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by admachi,
someone have bios for lenovo m80q tiny 11DQ?
please help-
Channel: BIOS & Schematic Requests!
Today, 03:21 AM -
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by SkullMurrayHi all, I' m a newbie in troubleshooting but I'd like to solve a quarter fan spin issue on a 820-5509-A board. Where should I start to solve this problem? Any suggestion is useful! Thank you!Today, 03:20 AM
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by PACKETSTORM2Hi
Need ec dump for Asus U31JG rev 2.0 or U31F rev 2.0, Thanks-
Channel: BIOS Requests ONLY!
Yesterday, 05:22 AM -
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by Carl0s-Hi,
Sooo - our IT got a pile of old iPads that the sales guys have been mistreating. These are free for grabs if you want to try to get one working. Thought I'd give it a try - if I get at least some life to I can give to my kid to entertain during a car rides.
But the iPad it self - its a 5th gen cellular model. When I initially plug it in it was completely dead. It was not recognized by my Mac nor it started to charge. Disassembled it opened up the battery connector and checked the battery voltage. My multimeter showed 0,7v. Had a spare micro-usb charging board lying...Yesterday, 12:51 PM -
by Ivan Rotarhi, I need a dump of two drives. 16mb and 4mb
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Channel: BIOS & Schematic Requests!
04-12-2024, 05:56 PM -
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by admachi,
someone have bios for lenovo m80q tiny 11DQ?
please help-
Channel: BIOS & Schematic Requests!
Today, 03:21 AM -
-
by pavithraI have 50 Chinese constant current isolated LED drivers based on LC6685 IC. 35 drivers are working fine, but there is a slight flickering in the rest of the drivers.
I have checked the output with oscilloscope and found that there is a slight random voltage fluctuation.
Is it possible to get the datasheet of LC6685 IC?
Also highly appreciate if you could let me know what could go wrong....1 PhotoToday, 02:46 AM -
by _Margo_Hello friends.
I need bios on Thunderobot 911x (or Hasee s8d6) DANLXBMB8C0 REV: C NLXB
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Channel: BIOS Requests ONLY!
Today, 01:10 AM -
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by EazyBoneGot this massive TV and tested they backlights and they were out. Took it all apart and replaced them. Put it back together and boom they work! I then run it for many hours and all still working. I then needed to factory reset to pass on to next person and...
I factory reset and it shows Hisense logo fully lit up, then Google logo for a couple of seconds and forces shut off. Now that's all the TV does. Hisense, Google logo force shutoff. How is this possible.. anyone have some experience or advice for this. All I can think is somehow I got a software corruption which is ridiculous...Yesterday, 07:31 AM -
by SkullMurrayHi all, I' m a newbie in troubleshooting but I'd like to solve a quarter fan spin issue on a 820-5509-A board. Where should I start to solve this problem? Any suggestion is useful! Thank you!Today, 03:20 AM
-
by Carl0s-Hi,
Sooo - our IT got a pile of old iPads that the sales guys have been mistreating. These are free for grabs if you want to try to get one working. Thought I'd give it a try - if I get at least some life to I can give to my kid to entertain during a car rides.
But the iPad it self - its a 5th gen cellular model. When I initially plug it in it was completely dead. It was not recognized by my Mac nor it started to charge. Disassembled it opened up the battery connector and checked the battery voltage. My multimeter showed 0,7v. Had a spare micro-usb charging board lying...Yesterday, 12:51 PM -
by Gecko-ECHi Guys, I hope someone can assist me me. I have a HP Probook G2. It came in for not charging. When charger plugged in power light on the charge port was flickering as well as the caps lock light. Not a pattern, but inconsistent. I found a faulty mosfet on the power input which I replaced. Problem I have is that it does not start up without a battery unless I use a 18.5v charger. It does however start with the 19.5v with the battery installed, but the battery charge voltage is 2.58v. The required charger for this unit is a 19.5v of which I have tried several. The battery is bad and have ordered...04-14-2024, 07:37 AM
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by LightMadHi everyone!
need [B]Surface Go 2 1901 Bios DAV81MB1AE0 REV E[/B]
dump . Thanks!Hi everyone!
need [B]Surface Go 2 1901 Bios DAV81MB1AE0 REV E[/B]
dump . Thanks!Hi everyone!
need [B]Surface Go 2 1901 Bios DAV81MB1AE0 REV E[/B]
dump . Thanks!-
Channel: BIOS Requests ONLY!
Yesterday, 09:50 PM -
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by AstrayHello, working on a laptop (MSI GS75 9SG-242US, Core i7-9750H, 2080 Max Q) and after replacing the screen and forgetting to disconnect the battery prior, I have no visible indications of power anywhere. It was working perfectly fine prior to the screen removal and replacement. Checked the motherboard PCB visually near the LCD connectors and didn't really see any indications of damaged surface mounted components but haven't looked under a microscope yet.
Battery charging light isn't turning on when plugged in and pressing the button does nothing regardless of being on battery power...04-14-2024, 09:35 AM -
by shlomim412Hello
working on a2141 macbook, board number 820-01700 which has no wifi\bt and also no connection with LAN cable.
initial visual inspection the board looks good no visible corrosion or damage.
i found that PP3V3_G3S_X is shorted to ground (around 1.5ohm short)
and also PP3V3_GS3_WLAN i shorted to ground (same ohm reading, around 1.5ohm).
the board is working but no WIFI\BT as i mentioned.
with the usb c cable connected for measurement i noticed U8215 i getting EXTREMELY HOT
so i pulled it out figuring it might be causing the...Yesterday, 01:18 PM