When a CPU motherboard shows no display despite powering on, the RAM's VPP voltage circuit may be faulty; by simulating the correct VPP voltage (2.5V) using a bench power supply, one can confirm whether the MP1475 IC is defective and needs replacement.
深掘り
前提条件
- データがありません。
次のステップ
- データがありません。
深掘り
Cpu Motherboard No Display - Simulating VPP Voltage #cpu #display #blackscreen #ram追加:
This PC turns on, but there's no display. After checking, I found that the RAM's VPP voltage is missing. Let's take a closer look. This PL7 is the circuit that supplies the RAM's VPP voltage. As you can see here, the voltage is only 0.08 volt. And here is the VIN voltage for the MP1475 IC currently measuring at 5 V. And here the voltage for the enable pin reads 4.5 volts. But the IC is still not working.
I think this IC is faulty. But before we replace it, let's simulate the VPP voltage using a bench power supply. So I'm going to inject 2.5 volts right here. And let's power on the motherboard. As you can see on the power supply, the current is starting to ramp up. And there we go. We got a picture on the
関連おすすめ
직관 및 곡관 배관 결합 고정 작업 #worker #process #fabrication #pipework #clamp
월드촌촌
2K views•2026-05-30
Wire To Wire Connection Trick | Strong And Secure Electrical Joint #shortvideo #wireworks
ElectricianTips-b1h
5K views•2026-06-02
Peterborough to Newark Northgate Driver's Eye View aboard an InterCity 225 - East Coast Main Line
TrainsTrainsTrains
822 views•2026-05-31
AI turbine design: hypersonic cooling leap #shorts #ai #hypersonic
bobbby_rn
671 views•2026-05-31
We Really Needed This…
bastarricafarms
627 views•2026-06-02
ALMOST COMPLETED:MILE 2 Interchange Nears Completion | Mega Construction Project
Emmanuelthecreator
267 views•2026-06-04
Mosquito Zapper with Schematic and Comparison to other Zappers
retireeelectronics2649
145 views•2026-06-03
Why you still can't book the 20-hour flight #travel #qantas #aviation
theavidaviator
1K views•2026-05-31











