PC acting weird

[Mysini]

Yesterday it was working no problem, today, however, when I tried to turn it on, fans spin but no display and mouse & keyboard do not light on.

 

I tried the following:

 

• Removing CMOS battery for 5 mins before replugging it

 

• Reseating ram modules and using only 1 stick of ram

 

• Completely disassemble & reassemble the motherboard with only 1 ram stick & CPU installed to the board

 

In all cases, I got the fans spinning but no display and the mouse & keyboard do not light.

 

Occasionally, after powering on and off multiple times or if I try again after a little while, the display would come for about 5-10 seconds then it goes away, the fans stop spinning (which doesn't happen when there is no display) then they spin again but with no display.

 

So, to summarise, it's one of these two results that I always get.

1. power on, fans spin, no lights, no beeps and no display (happens 95% of the time)

2. power on, fans spin, there's lights & display, goes away after a couple of seconds at the same time when the fans stop spinning

I appreciate any help, I need to do some inportant work on this machine

I5-2400 | 1060 3GB | Barracuda 1TB | thinkcentre M81 | 500W PSU

[sub68]

have you tried it with no gpu?

or change ram slots

[Mysini]

6 minutes ago, sub68 said:

have you tried it with no gpu?

or change ram slots

Yes. as I mentioned in my post.

Didn't work

[sub68]

1 minute ago, Mysini said:

Yes. as I mentioned in my post.

Didn't work

oh sorry the wording is hard, then my thinking is the motherboard might be dead.

 

[krakkpott]

Do you have other RAM sticks to test with?

 

This sounded alot like either a motherboard or RAM failure.

 

Small chance of CPU or PSU failure.

[Mysini]

7 minutes ago, krakkpott said:

Do you have other RAM sticks to test with?

 

This sounded a lot like either a motherboard or RAM failure.

 

Small chance of CPU or PSU failure.

Nope, I don't have any spare sticks but I took the pc to a PC shop and they tried GPU & ram (in a different rig*) which were fine

 

I'm suspecting it is the board but I have no idea why or what to do

[Mysini]

8 minutes ago, sub68 said:

oh sorry the wording is hard, then my thinking is the motherboard might be dead.

 

No worries!

 

Yeah that's what I think too, but if it's dead why the heck does it come back to life occasionally and seem like it is going to work.. Weird

 

It's a cheap motherboard but I don't have enough money to perform a full cpu+board+ram upgrade 

[Blademaster91]

1 minute ago, Mysini said:

No worries!

 

Yeah that's what I think too, but if it's dead why the heck does it come back to life occasionally and seem like it is going to work.. Weird

 

It's a cheap motherboard but I don't have enough money to perform a full cpu+board+ram upgrade 

A PSU can sometimes become unreliable enough to only work sometimes. Did the PC shop test it with another PSU?

[Mysini]

1 minute ago, Blademaster91 said:

A PSU can sometimes become unreliable enough to only work sometimes. Did the PC shop test it with another PSU?

No, they didn't

 

I have a spare 300W psu that I can test it with, though 300w aren't enough to run ky GPU

 

And if the problem is with the PSU, would that cause the no display problem while the fans do spin normally?

[sub68]

6 minutes ago, Mysini said:

but if it's dead why the heck does it come back to life occasionally and seem like it is going to work.. Weird

I remember a chromebook we gotten in and this happened.

 

 

1 minute ago, Mysini said:

I have a spare 300W psu that I can test it with, though 300w aren't enough to run

then don't test with the gpu.

[Mysini]

29 minutes ago, sub68 said:

then don't test with the gpu.

Well it's complicated, the motherboard doesn't have an HDMI or DP ports, and my monitor doesn't have any VGA or DVI ports so I'll have to 'steal' someone else's monitor to test it lol

[sub68]

ohh yeah borrowing a monitor might be the only option

[Blademaster91]

8 minutes ago, Mysini said:

No, they didn't

 

I have a spare 300W psu that I can test it with, though 300w aren't enough to run ky GPU

 

And if the problem is with the PSU, would that cause the no display problem while the fans do spin normally?

The PSU might only be supplying enough power for the fans to spin, but not enough for the motherboard to post.

And you'd have to test with the integrated gpu.

[IkeaGnome]

11 minutes ago, Mysini said:

Well it's complicated, the motherboard doesn't have an HDMI or DP ports, and my monitor doesn't have any VGA or DVI ports so I'll have to 'steal' someone else's monitor to test it lol

You could still see if it stays running long enough to look like it POSTed normally. Wouldn’t be able to see what is happening, but valuable clues. 

[Mysini]

14 hours ago, Blademaster91 said:

The PSU might only be supplying enough power for the fans to spin, but not enough for the motherboard to post.

And you'd have to test with the integrated gpu.

14 hours ago, sub68 said:

ohh yeah borrowing a monitor might be the only option

 

14 hours ago, IkeaGnome said:

You could still see if it stays running long enough to look like it POSTed normally. Wouldn’t be able to see what is happening, but valuable clues. 

 

Nope, the same pattern occurs with the 300W psu

[sub68]

1 minute ago, Mysini said:

Nope, the same pattern occurs with the 300W psu

probably dead motherboard

oh did you try a different monitor yet?

[Mysini]

Just now, sub68 said:

probably dead motherboard

oh did you try a different monitor yet?

Yeah I tried an old monitor with VGA, Also connected my keyboard to see if it'll light up 

 

Nothing happened, just like the 500W PSU

 

I think it's pretty clear now it's the motherboard acting naughty.. Any ideas on how to revive this b!tch till I manage to grab some cash for a new bundle