Hey Everyone ,
plz need bios .
hp 15s-du1520TU rev: 3.0
SN# CND14628HR...
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by signal.quest
Yesterday, 08:21 PM
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Troubleshooting Power Supplies and Power Supply Design
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PS4 PSU Schematic for N160A003L
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Toshiba MFD e-studio range
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Logitech Z5500 problem need help fixing
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Welcome to our newest member, itporadna.
Latest Topics
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Hi all
We have in a HP ProBook 445 G8 laptop with AMD Ryzen 7 CPU. When power is connected the power LED light blinks 5 times then stops. Normally HP laptops will blink this LED 10 times as it does a self test when the AC adaptor is inserted. So there must be some sort of short somewhere.
The battery doesn't charge, and is erratic on the MM voltage. Bench PSU LED pulsates when the battery is connected also. So the fault must be on the charging circuit?
I have gone around the board with a MM and cant find anything
Windows shows the battery fine,...Yesterday, 10:34 AM -
by alliettianyone have the schematic or simple pictures of the backside of N160A003L PSU for PS4??? i need some clues about 5v fault09-21-2024, 11:38 AM
-
Can clear ME region this BIOS?
Dell OptiPlex 5050 SFF
SN: D0FX7N2
Motherboard: V1PN4...-
Channel: BIOS & Schematic Requests!
10-08-2024, 04:33 AM -
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by objecttothisI have an MSI Ventus 3X OC nVIDIA RTX 3070 with a damaged HDMI connector. The display is recognized but no display output due to the damaged right-side of the connector. I've got the board apart and the back of the HDMI connector is stamped Astron. The problem is that their site has 30 pages of HDMI type A connectors ([URL]http://astron.com.tw/eng/product.php?idt=1&pid=3&cid=1[/URL]). Does anyone know how to determine which part numbers are compatible and then where to source them?
Also, I have some experience soldering but this will probably be the most...Yesterday, 12:51 PM -
by h3ct0rHello, after what is seems like a bad BIOS firmware upgrade, the machine had extrange visual glitches and froze.
The laptop now does not turn on as normal, and does not make post or show the BIOS page: It will stay at a blank page with beeping sounds: [URL]https://youtu.be/OC2o9_b1RQ0[/URL]
I'm planning to flash the bios chip with a CH341A, but it seems that they are three chip candidates:[LIST=1][*]Winbond 25Q80DVSIG (3V 8M-bit) Located on the GPU board[*]MXIC 25U8035F (1.8V 8M-bit) Located on the GPU board[*]Winbond 25Q80DVNIG (3V 8M-bit) Located on the CPU board[*]Winbond...Yesterday, 08:35 PM -
HP Pavilion 15-BS 250 G6 Laptop Schematic
CSL50 CSL52 LA-E801P...-
Channel: Schematics and Boardviews
10-08-2024, 07:48 AM -
-
by signal.questHi all,
I have been working on a Samsung LN40C630K1F LCD TV. On power up the backlights only briefly light up when first powered on then they go out (2 seconds to black). The flashlight test also fails. The sound works fine. Please see attached pics.
I have researched the forums a lot. I have watched the videos of trying to locate the bad CCFL or transformer and bypassing. I can't find any evidence of a bad transformer/CCFL. I verified I get 376V from the big caps to the fuse. I have used a small/cheap oscilloscope and it looks like the MOSFETs on the inverter...6 Photos09-30-2024, 11:21 PM -
by ExoticsHere's a video I uploaded to show the problem.
[url]https://youtu.be/MbaZQ7aYMMY?feature=shared[/url]
Quality isn't 1080p yet because I just uploaded it. YouTube takes a while to process videos to maximum quality.
I have a multimeter and basically no electrical fixing knowledge.
I came across a post on here describing the same issue if it helps y'all help me. -> [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-audio-equipment/38880-another-logitech-z5500-done-today[/url]
please...-
Channel: Troubleshooting Audio Equipment
10-04-2024, 06:17 AM -
-
by cheebsterHello, i have a batch of 10 Macbook Pros A2179 bought from a Costco return wholesaler.
The 10 of them show the exact same behavior;
They auto power on, to internet recovery spinning globe, fans to 100%.
Power consumption on USB-C port is 0.43a, shuts down as soon as unplugged. Battery doesn't charge at all. However, it boots to 20V on the Ampmeter.
Based on their iBridge versions (4.x and 5.x) these were shelfed for a long time.
All of them power on the same way; 100% fans, shut down as soon as they are unplugged. Removing...10-09-2024, 06:23 AM
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by objecttothisI have an MSI Ventus 3X OC nVIDIA RTX 3070 with a damaged HDMI connector. The display is recognized but no display output due to the damaged right-side of the connector. I've got the board apart and the back of the HDMI connector is stamped Astron. The problem is that their site has 30 pages of HDMI type A connectors ([URL]http://astron.com.tw/eng/product.php?idt=1&pid=3&cid=1[/URL]). Does anyone know how to determine which part numbers are compatible and then where to source them?
Also, I have some experience soldering but this will probably be the most...Yesterday, 12:51 PM -
Hi all
We have in a HP ProBook 445 G8 laptop with AMD Ryzen 7 CPU. When power is connected the power LED light blinks 5 times then stops. Normally HP laptops will blink this LED 10 times as it does a self test when the AC adaptor is inserted. So there must be some sort of short somewhere.
The battery doesn't charge, and is erratic on the MM voltage. Bench PSU LED pulsates when the battery is connected also. So the fault must be on the charging circuit?
I have gone around the board with a MM and cant find anything
Windows shows the battery fine,...Yesterday, 10:34 AM -
by retrorepairHello gurus, hope you can assist me...
I have a Sony KDL.40P3600, with an issue on the left side of the screen (pictures attached).
I think the problem is the panel, but before send it to trash, i would like to get a second opinion.
Thanks in advance.2 PhotosYesterday, 05:12 PM -
by Francesc V.Hi:
This TV turns on and it can show picture for some seconds (sometimes minutes) then picture freezes and fades away. What I've seen so far is that the T-Con (BN41-021101A) starts with three leds on, but as soon as led3 turns off, just 12V and 3.3V (the bold ones) remains in the PCB but all others disappear.
If I remove the 2 bellow ribbons, LED2 never turns on. I was trying to look for the "T-CON ready" pin to shorten with 3.3V and then test just the TCON without the panel (haven't found it yet)
Not sure how to proceed here..............how can...10-09-2024, 07:01 AM -
by h3ct0rHello, after what is seems like a bad BIOS firmware upgrade, the machine had extrange visual glitches and froze.
The laptop now does not turn on as normal, and does not make post or show the BIOS page: It will stay at a blank page with beeping sounds: [URL]https://youtu.be/OC2o9_b1RQ0[/URL]
I'm planning to flash the bios chip with a CH341A, but it seems that they are three chip candidates:[LIST=1][*]Winbond 25Q80DVSIG (3V 8M-bit) Located on the GPU board[*]MXIC 25U8035F (1.8V 8M-bit) Located on the GPU board[*]Winbond 25Q80DVNIG (3V 8M-bit) Located on the CPU board[*]Winbond...Yesterday, 08:35 PM -
by Aadi AwanHey Everyone ,
plz need bios .
hp 15s-du1520TU rev: 3.0
SN# CND14628HR...-
Channel: BIOS Requests ONLY!
Yesterday, 11:09 AM -
-
by CesarTurboPCCould you help me... I have a Samsung UN55MU6103F with the following problem, dead TV, I disconnect the main power supply and the leds light up. I know it is a problem in the firmware in the IC SPI Flash W25Q40CL (IC1604)
The model of my TV is
UN55MU6103F
Power supply BN44-00807A
Main Board BN41-02568B
Could you help me to repair the dump please. Thank you.
I leave my backup of the dump and a little extra, it is the schematic of the power source, it can be useful to someone. Regards
Me podrian ayudar... tengo un...01-31-2023, 12:30 PM -
by ceakHi, I bought a defective OLED Tv thinking I would just replace the defective board and make it work. The problem was that the TV would turn on with sound but no image. I replaced the TCON first, didn't do anything so I replaced the main board and psu boards too but to my surprise the problem is still there.
So I began testing the PSU to see if at least all voltages were good. What I found is that all the voltages seem good (standby, AC_On, TCON_12v and PWR_On). The missing voltages seem to be EVDD and I'm not sure if BL_ERR should be high or low and if EVDD_ON should be just a pulse...01-21-2021, 05:55 PM -
by StephenCustomer came in with a board issue, board looks clean, board turns on, he did a software update and he got the infamous Apple boot loop logo. He took it to Apple and Apple said he needed a new board. They attempted to DFU revive restore etc no luck. The board is stuck on the (!) point. I tried DFU myself and no luck. Nothing, board boots up goes into DFU computer turns on with Apple logo when applying the patch and nothing it gets stuck at halfway point and hangs on. I was wondering if anyone has had any experience with this particular issue. Board isn't liquid damage from what I can tell...Yesterday, 11:14 AM
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by ZOrd_ZHello!!
I'm trying to find some place to buy a specific Nikon DC plug [B][URL="https://www.maritimusboote.de/Nikon-AC-Adapter-EH-6/pt"]Nikon AC Adapter EH-6[/URL][/B]
Just the jack or jack with cable.
This is to implement a bunch of cameras for a lot of time...
Anyone has an idea where to get the jacks at a "decent price"?
Thank's...Hello!!
I'm trying to find some place to buy a specific Nikon DC plug [B][URL="https://www.maritimusboote.de/Nikon-AC-Adapter-EH-6/pt"]Nikon AC Adapter EH-6[/URL][/B]10-10-2024, 07:28 PM