Computer turns on and off, hdmi and usb ports dont work

[tan_dennis97]

Recently I took apart everything from my PC for a good cleaning and then i put it back together afterwards. The LED's and fans still work including the heatsink. However, now the GPU ports don't work and also my USB ports. It still charges my phone though when i plug it in.

i7 4790
GTX 780 Ti

 

[maz89]

Which mobo do you have? Are you able to POST connected to on-board VGA?

 

[The Paladin]

make model of power supply please.

 

[tan_dennis97]

Which mobo do you have? Are you able to POST connected to on-board VGA?

Using AS Rock B85M Pro 3. Gpu fans still spin though.

 

[tan_dennis97]

make model of power supply please.

Apparently its an old made in china PSU.

 

[maz89]

make model of power supply please.

Apparently its an old made in china PSU.

This could be the culprit. Can you get your hands on a spare PSU to rule this out?

 

[tan_dennis97]

make model of power supply please.

Apparently its an old made in china PSU.

This could be the culprit. Can you get your hands on a spare PSU to rule this out?

I do have another psu on my main PC. Does a psu really affect the gpu and usb port connection though?

 

[maz89]

Your computer is not POSTing, correct? Going on an endless loop of turning on and off without any display?

Could be due to a myriad of issues, but cheap unknown PSU is often the cause. Try the other power supply, your GPU/USB ports may begin to work as they may be drawing insufficient power right now. If not, we'll take it from there.

 

[tan_dennis97]

It was working fine before i took it apart though. The USB ports still give power since im able to charge my phone still. I'll probably try out the psu later today.

 

[tan_dennis97]

Your computer is not POSTing, correct? Going on an endless loop of turning on and off without any display?

Could be due to a myriad of issues, but cheap unknown PSU is often the cause. Try the other power supply, your GPU/USB ports may begin to work as they may be drawing insufficient power right now. If not, we'll take it from there.

changed my PSU and still doesn't work. Could it be the motherboard?

 

[The Paladin]

if you take the ram out of motherboard and try to boot does it still power cycle ? does it make beeping sound?

 

[tan_dennis97]

It still continuously restarts when I take out the RAM. No beeping sound. I have tried resetting the cmos battery as well on the MB. I'm guessing its the issue with my MB. Is there a chance my cpu is damaged?

 

[hang-the-9]

Since this started when you took it apart, go over the setup again and make sure everything is plugged in properly, cables, CPU, heatsink, motherboard is in the case properly with stand-offs, power plugs, reseat RAM.