Acer nitro 5 AN55-515 fh51m LAJ871P no picture

[martin83]

Hello everyone.
I'm here to ask for help troubleshooting an issue with my Acer Nitro 5 An55-515. Board number fh51m LAJ871P .
The laptop turns on without any image, and after inspection, I noticed the 1.2V voltage was reading 8V spikes. The PQM1 MOSFET's gate was shorted to the source.
I replaced PQM1, PQM2, and PUM1. After turning on the machine, the 1.2V voltage appears correctly for about 1 minute, but after that, PQM1 shorted again. The MOSFET and controller assembly has already been replaced twice and continues to blow. I can't understand what's going on. I should also add...

[mohamedbalwe]

hello everyone
i need bios dvr DS-7204HQHI
motherboard code 80303-p rev 2.2
The attached file is lock pass...

[Khôi Minh]

Help me
ST : 40SMTC3...

[jm1234]

Hi,
it's a PoE camera and it stopped working. Using thermal image I identified failing component U22 marked as 16AF which seems to be buck convertor TI https://www.alldatasheet.net/datashe...62569DBVR.html. I took it out and It is inteed shorted on the output. However, after I took it out, the resistance between the output pads (on the board) still shows 190ohm, is that bit low?
Another issue is, seems to me I must be missing one of the tiny resistors R810 that should make up the voltage devider for the buck convertor. Honestly I did this months ago, I cannot...

[unimatrix93]

Dear forum

My Samsung fridge died from a fault on the mainline and the transformer (https://www.hqelektronika.hu/hu/halo...-w8-da2600009k) died.
No voltage on the secondary, measuring resistance shows open circuit. I concluded a blown fuse which is deep inside the transformer, I don't think I can disassemble it to replace the fuse.

The second problem is that I cannot find an original replacement part anywhere or even If I do it's pretty expensive.

My question is: Can I replace this transformer with a generic 230V to 17V one? The output has 4...

[starbio7]

Am trying to repair my desktop motherboard that suddenly wont boot.
I noticed that a surface mount capacitor has blown and also there is now a short between +12V rail to GND.
Any help is appreciated.

[sunofra78]

Hi.
Does anyone have iPhone 12 Pro Max Schematics they can share? I have the board view through ZXW... but really need the schematics.
Thanks!...

[Aliencomputres]

Hello, does anyone here have a backup of nvram with resettable ink chip?
Thank.

[Windows8RTMUser]

I just swapped it from an MPG B550I Gaming Edge WiFi 7C92 to a B550M PRO-VDH WIFI 7C95, flashback is working, if anyone knows a reliable source for this chip besides taking it from a donor board, please leave a reply...

[xsd611]

Hello, this is a BIOS file for the Lenovo X270 laptop, read out through a CH341 programmer. I located error 1802 in the PE32 module. This is a detection for the network card's whitelist. How can I bypass or remove the whitelist check? My skills are limited, and I have tried many times but ended up with a black screen. How can I normally bypass this whitelist check? Please help me edit this BIOS file, thank you. It would be great if you could provide illustrations to guide me. Thank you very much!...