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Installed new case fan, now computer wont turn on

BlaezaLite

BlaezaLite

Joined
Mar 25, 2020
Messages
1,828 (0.96/day)
Location
Over the Hill UK
System Specs
System Name AMDWeapon
Processor Ryzen 7 7800X3D -20 CO
Motherboard X670E MSI Tomahawk WiFi
Cooling Thermalright Peerless Assassin 120 ARGB with Silverstone Air Blazer 2200rpm fans
Memory G-Skill Trident Z Neo RGB 6000 CL30 32GB@EXPO
Video Card(s) Powercolor 7900 GRE Red Devil minor undervolt
Storage Samsung 870 QVO 1TB x 2, Lexar 256 GB, TeamGroup MP44L 2TB, Crucial T700 1TB, Seagate Firecuda 2TB
Display(s) 32" LG UltraGear GN600-B
Case Montech 903 MAX AIR
Audio Device(s) SteelSeries Arctis Nova Pro Wireless + Wicked Cushions Gel earpads
Power Supply MSI MPG AGF 850 watt gold
Mouse SteelSeries AeroX 5 l Forza Pad GameSir G7 SE l Power A OPS V3 for FPS (paddles)
Keyboard SteelSeries Apex 9 TKL
VR HMD -
Software Windows 11 Pro 24H2
Benchmark Scores Enough for me
As the title says really. Literally makes no sense.
 
Does it work again once you disconnected it?
 
Nope.
 
caused a short maybe?

unplug everything and try it on just with the cpu, cooler, ram, psu obviously is the way i would go about it
 
If it doesn't do anything anymore , it may have been static electricity when you installed the fan.
 
Great. What do I do in regards to that?
 
Hi,
Clear cmos with mother board jumpers
Remove mother board battery for a while 30 minutes after.
 
"won't turn on" is borderline useless information.

  • Do you get a crackle when you plug a live power cord into the back of the PSU, regardless of whether the PSU switch is on or off?
  • Do you have motherboard diagnostic lights and are they lit at any point after trying to power on?
  • Does the PSU fan spin?
  • Do any system fans, CPU fans, GPU fans spin?
  • Are you sure the power button works and is connected to the right header on the board?

So, to help you we need to know what you've tried, what the exact behaviour is of the cord, the fans, the lights, and stuff like that.
 
Cross fingers and startup.
 
Didn't know how to do motherboard jumpers, so just took battery out.

Plugged backin without battery and mobo lights started flashing
 
What's the motherboard model? You didn't plug the fan in while the pc was on did you? (don't ever do that just saying) yes just by taking the battery out and in "3 seconds" should clear the motherboard BIOS

There should be a colored blue/black pin on the motherboard titled cmos clr or similar and you should pull the pin out then only onto the other one pin then back to the two pins
 
See my specs. No I'm not that daft. CPU light is flashing.

Have I just fried my CPU?
 
CPU diagnostic light on the motherboard? That's not a great sign.

Sounds like you removed the battery and reinserted it whilst the board had standby power if it came to life while you were plugging the CMOS battery in. You may have killed your BIOS doing that.

To clear CMOS properly you want to
  1. unplug the power cord,
  2. hold down the power button on the PC for a couple of seconds to drain any residual charge in the PSU capacitors
  3. clear cmos jumper for 5-10 seconds OR remove battery
  4. it doesn't hurt to press the power button one more time just to make sure that there's no juice left anywhere in the system whilst the CMOS loop is open
  5. reinsert jumper or battery
  6. reinsert power cord.
  7. power on and WAIT for at least 3 minutes. AMD boards can take a while to first-boot after a reset, redo memory training and reach the BIOS for the first time.
 
Now its just clicking and flashing the CPU light.
 
Some people have been known to plug a fan into the wrong header; do you have a picture of the header you used?
 
Last edited:
It was the fan hub on the back.

Still doing the same thing. If its fucked its going out the window.

Still click flash.
 
Disconnect power to the fan hub and try again. May be that you killed the hub.
 
re-read post #4
 
I just punched it and now the fans are spinning and its flashing and clicking but faster.

The biggest joke of all is that I have an ESD strap on the way today. I'm not touching the thing until that's here. When I turn on the PSU the fans spin and flash click CPU light.
 
I had an issue where I plugged an industrial fan (San Ace or Delta) into my PSU for testing and a similar thing happened, but it turned out the fan, even though it had a standard three pin connector did not have a standard three pin pin-out. Luckily it was only the fan that gave up the ghost.
 
The fan was plugged into a fan hub and is the same brand and power (Aerofoil and 0.15amps). Most likely I've fucked it by being an utter scrotum and not waiting for my ESD strap which is on the way as we speak, as well as a mouse mat, mouse, mx4 and something I've forgotten.
 
It used to be that on some motherboards if it didn't detect a fan/load on any of the CPU headers it would shut down.
 
My CPU fan is still plugged in. Just want this fucking to move its amazon ass and I can disassemble and THEN start praying.

Can you fry a CPU by ESD?
 
Wonderful news. So me taking this all apart may be for nothing?
 
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