Good evening, can you help me fix this BIOS? I have an error with the ventilation. The rpm sometimes gets very high and makes a noise as if it's going to take off, and other times the fan doesn't work. thank you so much

SURFACE MODEL: 1769
SERIES: 025532492457
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peste
But my request for help is buried. I've searched, I've searched in the thread for the model, but the posts cited weren't helpful. I think I'm misunderstanding the rules. Thanks....

30 days ago a Dell Vostro 3400 came to the workshop with a power failure. According to the schematic, the issue was PU301 (SY8286BRAC). I ordered the chip from AliExpress and replaced it.
Now the board powers on, battery charges, and current draw is normal, but there’s no video output.
I’ve already tried several BIOS files posted here in this forum for similar machines. Some don’t even power on the board, others turn on and then shut down. I also tried cleaning the original BIOS using the official Dell update, but still no success.

Here are the details:

• Dell Vostro 3400
• Reg

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Good evening, colleagues.
Does anyone know an equivalent or a compatible replacement for the uP9002P IC (power controller)? Alternatively, does it come under any other marking or code on different boards?
Any insight or cross-reference would be greatly appreciated. Thank you in advance!