No output on first PC build after 2 years

kipperblossom

Reputable
Sep 4, 2017
2
0
4,510
I am having some issues with my computer; this was my first (and only) build, made about 2-3 years ago. I lost my PC Part Picker list so some of the parts are slightly general. I did Google the issue and already tried a few things (see below). I’m trying to decide what components to replace first or advice on how to proceed.

General problem: There is no output to monitors or keyboard, and the computer EITHER turns off after 5-7 minutes (fans will turn off for half a second and fire back up every minute or so during that time) OR turns off (and stays off) after 1-2 minutes.

Additional symptoms:
- No beeping from motherboard
- Solid red LED at front of case with very occasional flashing (hard drive light?)
- Blue power ring around power button does not turn on at any point
- Back and top case fans do not turn on (had trouble with top case fan before, that motor may have burned out/been a separate issue).
- CPU fan, graphics card fan, front case fan and front LED does turn on

PLEASE NOTE: The night before the issue, we did have some lights flickering in our apartment (my husband and I), but everything is plugged into a surge protector and it still shows that it’s good.

Things I already tried:
- Unplugging PSU and holding power button for 15 sec
- Removed CMOS battery for one minute then replaced it – battery should still be good (multimeter shows 3.1V)
- Plugged different keyboard in (Insignia USB keyboard), still no lights on keyboard
- Plugged mouse into all USB ports on motherboard and got lights; keyboard plugged into same USB ports and still no lights
- Graphics card taken out, monitors just plugged directly into motherboard. Exact same symptoms.
- Unplugged everything from PSU and tried a completely different one (SeaSonic – 650W 80+ Gold Certified Semi-Modular ATX PS); no change in symptoms

Components/Part List:
MOBO: ASROCK H97
PSU: Antec HCG-620M
GFX: Sapphire Dual-X R9 270
RAM: DDR3-1600
HDD: Seagate 1TB HD
CPU: I3-4150
Case: Rosewill Challenger
OS: Windows 10

Peripherals:
19" Dell 1905FP DVI/VGA LCD Monitor
Acer – H236HLbid 23.0” 1920x1080 60Hz Monitor
Razer DeathAdder (mouse)
Razer BlackWidow Chroma (keyboard)

TL;DR: Black screen/no output, need to narrow down components to try replacing first or advice on fixing.
 

kipperblossom

Reputable
Sep 4, 2017
2
0
4,510


I did also try using a completely different PSU because I was hoping that was the issue, but was getting the same symptoms, and that reasoning makes sense. Looking at the mobo nothing looks overtly fried/off but I guess it wouldn't need to (just would be nice to know what went wrong/why)