New Pc won't Post

Horndrill · 15 Jun 2020 at 15:07

So I recently upgraded my pc, installed all components without a hitch but noticed my cpu was running a little hot. I removed it, replaced thermal paste and heatsink and now my pc won't boot.

It turns on but with a red light on the "Ez debug" lights next to dram. Doesn't reach bios.

I figured my cpu got fried somehow and got a new one to test, no luck. So I figured it must be ram. Tried the ram on a different rig with no issues. So it must be the motherboard right? Well no because I tried on a new motherboard and the exact same issue happened.

I'm at a loss, it must be something I'm doing but I installed all these parts previously without much issue.

Ryzen 5 3600
Msi B450 Tomahawk Max
Gigabyte X5700 xt
Corsair Vengeance Pro 16gb 3200mhz
240gb ssd
1tb hdd

Thanks

Horndrill · 15 Jun 2020 at 15:40

Minibiker said:
Maybe you have over tightened the CPU cooler, sounds odd but can be the case

I've loosened them a fair bit, nothing

Horndrill · 15 Jun 2020 at 16:00

Admiral Huddy said:
It's quite hard to overheat CPU's nowdays tbh.. You tries a different mobo but have you tried different RAM and video connection?

I've tried a different motherboard, cpu and gpu. I've not tried new ram but the ram worked on a different rig. Psu is fairly old but all the lights power on and it was working fine until a few days ago

Horndrill · 15 Jun 2020 at 16:54

ExRayTed said:
Get it all out of the case, on top of a motherboard box or similar, and try again. Just connect the cpu, 1 stick of ram, the gpu and obviously the power supply and try turning it on again. If it still won't post my guess is the same as Huddy's - duff cpu.

I already have it out on the box If it was the cpu why would the debug light indicate it was the ram? This is the second cpu I've tried

Horndrill · 15 Jun 2020 at 16:55

Musty Pie said:
im going to hedge a bet on PSU, whats your PSU spec and how old is this?

I dug out my old mobo, cpu, gpu and ram and connected it, it booted up instantly. Problem is cpu and ram are incompatible with new mobo

Horndrill · 15 Jun 2020 at 17:05

Musty Pie said:
What if your PSU spec is not rated for your new MB ram and CPU? Testing this PSU on older CPU board and RAM doesnt mean its not still a cause of the problem.

I've had this pc running before with the psu. It's a corsair cp 9020055 rm 750w

Horndrill · 15 Jun 2020 at 17:57

So I finally got it to boot. But it only boots with one stick of ram, doesn't matter which but the moment I try two sticks, it fails. Thoughts?

Horndrill · 15 Jun 2020 at 20:16

Minibiker said:
Might be one of the slots faulty... Which slot does it boot OK with

Sorry I needed to take a break. Super frustrating! It seems to work in just the one slot. Tried replacing the heatsink in case it was too tight. Now I'm having trouble getting it on again. Is it possible to move the cpu out of place when connecting the heatsink?

Horndrill · 15 Jun 2020 at 20:25

I can get it on and all ram slots seem to work but only one at a time

Horndrill · 15 Jun 2020 at 20:45

Minibiker said:
It is frustrating when things like this happen, if the CPU is in the socket properly then it shouldn't move when placing th cooler on it as the pins do a good job of holding it in place.... The CPU pins all OK?

Yeah I took it out and had a look, seems fine and the cpu doesn't move when in the slot.