Computer starts up, yet the monitor keyboard and mouse remain inactive.
Computer starts up, yet the monitor keyboard and mouse remain inactive.
I constructed my friend's computer around a year ago. It has been functioning smoothly ever since, but recently he mentioned leaving his house and leaving the PC on with sleep disabled. When he returned a few hours later, it was still active, yet the keyboard, mouse, and monitor wouldn't turn on, and the caps lock didn't light up either. We attempted to unplug from the rear, press the power button briefly, wait a few minutes, then reconnect, but nothing resolved the issue. Interestingly, another friend asked for my help a few days ago because they were facing the same problem. From what I've researched, possible causes include the PSU, motherboard, or RAM, though I'm not entirely convinced. Anyone has dealt with this situation before or has any advice?
It seems the PSU isn't providing sufficient power for all the additional features at startup. Without enough energy it may shut down USB and monitors to save power for the CPU. Are the specifications listed for this PC or yours? How long has the PC been in use? Only practical tests are: the paper clip method – https://forums. this simply verifies it powers on, which we already know. or using a multimeter – https://www.lifewire.com/how-to-manually...er-2626158 or checking the BIOS for +3.3V, +5V, and +12V readings – https://www.lifewire.com/power-supply-vo...es-2624583 these are less effective than a multimeter and may not help if the screen fails to work.
The specifications apply to the computer in question, which is about a year old. When my other friend experienced the issue a few days ago, we initially suspected the power supply was the problem, but after replacing it, the issue continued. I recently watched a YouTube video where someone with a similar problem explained that removing the reset cable in JFP2 resolved it. I’m not sure how that method would work.
It could assist if the case cable is the issue, perhaps.
You might consider breadboarding it, removing it from the case, and checking if it starts with minimal connections.
How To - Simplifying the process for troubleshooting
If you need to read this, it indicates something is severely wrong with your PC, requiring a thorough hardware-level investigation. Breadboarding is essential. A brief note: breadboards were once our lab tools in electronics school. I don't know why they began...