i need help finding an ic's name since there is no schematic or boardview for this laptop
board : nb8608_mb_v4
ic name on board : w0ZHE
ic gets hot
board : nb8608_mb_v4
ic name on board : w0ZHE
ic gets hot
Attached Files
-
-
-
Re: Lenovo s540-15IWL wont power on
anyone has a idea about this im stuckComment
-
Re: Lenovo s540-15IWL wont power on
Hi, I need a help to identfy the shorted capacitor on this board NB8608_MB_V4
Lenovo S540-15IWL GTX, SN: YX002A60. laptop powers up after capacitor been removed but I dont wan to leave it empty.
thanks in advanceAttached FilesComment
-
-
Re: Lenovo s540-15IWL wont power on
You will have to do some detective work here. The missing part appears to be near the large inductor which is linked to the nearby switching (buck regulator) with the 'LJ=' markings = Richtek.
Once you find the Richtek datasheet for this part, you will find a reference schematic which should be a clone of what is on your board. Using a meter in DIODE mode, you can review from the ref schematic as to what is missing.
Update:
LJ= is Richtek part # RT6258CGQUF.
Datasheet:
https://cdn.badcaps-static.com/pdfs/...77f23153ec.pdf
Review the highlighted areas of the schematic - your missing part(s) are most likely one of these.Attached FilesLast edited by mon2; 11-01-2023, 11:09 AM.Comment
-
-
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hello everyone,
I'm trying to repair the power supply board from a Lenovo ThinkVision P40w-20 monitor. The board is labeled with the following markings:
- Main PCB code: ILPI-422 VA (dated 2021/11/24)
The monitor is completely dead, no power LED or backlight. Upon inspection, I found a few components that appear damaged, particularly some resistors that are burned and unreadable.
Attached is a high-resolution photo of the power supply board.
Does anyone have a schematic, boardview, or similar power supply that can help identify the... -
[HELP] Acer AN515-55 (LA-J871P Rev: 1B) – Board won't power on after GPU investigation – Suspecting Super I/O or PCH
Hi everyone,
I'm working on an Acer Nitro 5 unit with the following specs:- Motherboard: LA-J871P Rev: 1B
- Model: Acer AN515-55-59MT
- S/N: NHQ7JAL00403906A973400
- SNID: 03902728734
Initial Issue
The laptop initially presented graphic issues and driver failure (Code 43) for the GPU.
After preventive maintenance (cleaning, thermal paste, etc.), it powered on normally. We disassembled it again to inspect the GPU, reassembled... -
Hi and thanks in advance for any input you might provide!
I have a Sceptre U550CV-UMRD8POTV83BB 4K LED (this is a dumb tv) that I bought new in August 2021, so It's just completed 3 years.
Main power board model: TP.MS3683.PC821 T-Con board: N4TP546UHDPU2L_BO
Last Sunday I was watching a dvd and fell asleep for about half hour, when I awoke the tv screen was black and couldn't get the dvd menu to show, so I changed the input to antenna and had sound but no picture, turned it off. I then got online and found this great site! ....read many troubleshooting tips and this... -
Hi everyone,
I am trying to fix a samsung washinmachine power supply main board.
I already replaced it with another one to fix the machine but i want to try understand the issue with the old board.
Therefore i hope to be able to get some help to explain what to check in order to troubleshoot.
The power supply board reference is the following: DC41-00189a
I have followed one thread (https://www.badcaps.net/forum/troubl...ingmachine-rel...
Comment