Booting up old system, monitor screen remains black

[Christos_Gkagkas]

I’m trying to bring back to life 2 old (10+ years) systems that were strong at their time. Both system were working recently when i tried to boot them on my parents house.

After bringing both of them to my house, I plugged one of them with the power & DVI cables that I use on my main system. I boot it, it worked.

I turned the system off, bring a USB with a disk wipe software and plugged it. Then I reboot it.. Monitor screen stayed black after booting.

More facts about the issue:

[ul]
[li]Afterwards I plugged the cables to the 2nd old pc and screen remained black to that one too.[/li][/ul]

[ul]
[li]I’m not sure if the monitor was displaying any messages. I think it didn’t when plugged and a “check the cables” warning was shown only after unplugging the dvi from the system.[/li][/ul]

[ul]
[li]Both the cables and the monitor are working perfectly fine with my main PC.[/li][/ul]

[ul]
[li]Cooling, CPU and GPU fans are working.[/li][/ul]

[ul]
[li]I removed (and of course re-put in after a while) CMOS and tried again. Didn’t work.[/li][/ul]

[ul]
[li]I tried to plug the DVI cable to all DVI slots, didn’t work.[/li][/ul]

I’m an amateur programmer and this systems are my first attempt to jump into hardware and earn the basic experience for repairing and building. I have the very-basic theory knowledge from high school as it has software/hardware focused. What may be the reason for this problem and what should be my next steps?

[veeg]

Hello

Hopefully some of our members will chime in soon..

@PeterOz

[PeterOz]

can you open the case of both and give the motherboard name and model.
Example Asus B450

[PeterOz]

Also when the case is open. Turn off power. Press on button a couple of times to drain all power.
Remove the ram check if clean and reseat.
When working inside a computer touch something metal first to ground yourself and remove static electricity.
Test

[Christos_Gkagkas]

Also when the case is open. Turn off power. Press on button a couple of times to drain all power.
Remove the ram check if clean and reseat.
When working inside a computer touch something metal first to ground yourself and remove static electricity.
Test

i’ll try it. I cant understand thought why did the same issue happen to appear at 2 systems that were functioning before

[PeterOz]

Welcome to the world of computers
Are you using power boards/strips? If yes disconnect and go direct to power socket

[Bruce]

if the blank screens only happened after that “USB with disk wipe software” was plugged in, have you removed that USB stick and tried to boot again without it?

[Bruce]

@Christopher Caruso - any updates?

[Bruce]

closing thread

[Bruce]

thread re-opened as per OP request

[Bruce]

@Christos Gkagkas - what was the updated you wanted to post about?

[Bruce]

thread abandoned