PC doesn't post after restart

Rabbitlevel20 · October 1

I'm encountering a very weird behaviour,

I was using firefox and having nothing on background out of ordinary, suddenly keyboard and mouse had no response (lights were still on) and I couldn't get any response so i press power button for 5 sec to turn off and restart.

Upon first restart screen is showing black with a single flashing underline on top right, afterwards all restart the PC wouldn't post and 'CPU' boot light on motherboard was constantly ON.

Tried for several hard restart but still encountering the same issue, I just turned off the power and tried again the next morning and now it's booting okay.

Anyone knows what might be possible issue?

CPU: Ryzen 5700x (no overclock)

GPU: RX 6700xt

MB: Gigabyte AB-350 GAming3-CF

Ram: 16gb 2400mhz DDR4

PSU: Seasonic 650 watt

So far I checked CPU GPU temp is okay, haven't done any stress test since successful post

EDIT: I found when my pc case is lying horizontally it boots, if put vertically it doesn't, is it possible it's socket connection?

Robchil · October 1

11 hours ago, Rabbitlevel20 said:

EDIT: I found when my pc case is lying horizontally it boots, if put vertically it doesn't, is it possible it's socket connection?

sounds like a mechanical fault yes.

i would open up and check if everything is mounted properly.

or if everything is properly attached. like cpu socket, dimm sockets, pcie sockets.. etc.. basicaly anything on the mainboard..