My PC Won’t Boot Up After Plugging an Old HDD

[gleaming pebble]

Hello guys. Sorry to disrupt…

I have a problem with my PC. So yesterday I plugged my old PC 3,5 HDD to my internal new PC to look at my old data. I turned on my PC and it worked perfectly fine, so I copied all the data from my old HDD to the current PC. Afterwards, I shut down my PC and unplugged it. When I tried to turn on my PC again, it had power but it won't boot up. I can’t go to the bios or do anything, so I have no idea what went wrong...

Maybe anyone here has had the same problem, or know the solution to this problem? Thank you

[short wedge]

I'd go back in and recheck your connections. The minimum you need to boot are Motherboard, CPU, GPU (unless CPU has integrated graphics which most intel ones have), RAM, Power Supply, and Monitor. With this much you should at least get to BIOS. So I'd go and check each one is installed correctly

Cause maybe you disconnected something on accident

[gleaming pebble]

Sure I’ll recheck all the components then. Thank you

There is also a suggestion that I should try to remove and reattach the motherboard battery. Will that make any difference?

[drowsy parcel]

Taking the cmos battery out (while the pc is completely disconnected from power) for a few minutes and putting it back in would reset ur bios settings and has a high chance of fixing ur problem

I had this same problem and fixed it by doing that

[gleaming pebble]

Right… thank you for your suggestion. I’ll try it ASAP

[gleaming pebble]

Unfortunately it didn’t work😭

[gleaming pebble]

All connected. It still won’t boot up

[short wedge]

What’s popping up on the monitor when you turn on the PC? Like does the screen change at all?

Also, maybe it’s something simple like your monitor is on the wrong channel. So that’s quick and easy just to check

[zinc galleon]

If you didn't wipe the hdd then it could be trying to boot off that, potentially.

[short wedge]

Maybe reconnecting that is worth a shot. If your PC is already open it’s not too hard just to try it, it won’t hurt anything. But I’m not too confident in it working

[gleaming pebble]

No, sorry. It worked!!. So I unplugged the motherboard battery and waited for 15-20 mins before I plugged it back.

The issue was, I had to wait for a while with a black screen (I don’t know why). I panicked at the moment (the moment I replied you back) and without doing anything, my PC restarted itself and it went to BIOS.

So I configured to make sure it boots up the correct drive, restarted it, and it went back to normal afterwards😭

Sorry, but thank you very much for your help🙏🏻

[short wedge]

Oh wow, okay that’s good to know. Glad you got it working