Skip navigation Bottom Menu ↓ Menu ↑

PC won't POST (Read 4790 times)

0 Members and 1 Guest are viewing this topic.

  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
Dang thing was running fine before I fixed it. ;D

I bought a new AMD RX 480 on Newegg and an i5 CPU on ebay, installed them and it won't POST. Can't get to the EUFI BIOS.

I stuck a new CMOS in it, reseated the RAM, video card and all other connections. Started my main PC with the SSD (Windows 10) as a test and moved it back. Threw the i3 back in it (same - no POST). Used known good SATA and power cables. Removed the video card to try Intel graphics with no joy (fans spun up on the card). All the fans spin up (CPU + 2). Don't have a backup PSU. I don't think I bent any pins while installing the CPU (I'll take a closer look after trying to get some sleep).

I'm out of ideas. :-\

  • Mandalorian Protector
  • Wand Holder
  • *
  • Ib'tuur jatne tuur ash'ad kyr'amur
  • Sequoia Supreme
  • Posts: 9717
    • Male
I feel your pain. I just got a AMD RX 460 yesterday. Thought I had the power needs covered, just needs 75w off the rail the specs said. I get the card (its nice and shiny) and get everything in, and nothing. Black screen. Wont boot up, just black screen.

So I check the Intel HD is shut off, cant shut anything down in BIOS to force the PCI-e to get used over the on-board. So after checking few different things I have come to realize I need a bigger PSU.

For your problem, have you tried the GPU with the old CPU? Also double check your PSU. More I read it is a good idea to go over the min system requirements, so if you need 400w get a 500w. I found a deal on an EVGA 600w at bestbuy on sale. So might get that today.

oh and fyi, get a mechanical keyboard, so much easier to type, and reduces stress injuries 

  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
Re: PC won't POST
Reply #2: November 05, 2016, 08:34:14 AM Last Edit: November 05, 2016, 09:13:32 AM by brickbatz
I took the RX 480 out and connected the monitor to the motherboard via HDMI (running off Intel built in graphics). I was able to get into the BIOS for less than a minute (it was intermittent, flashing off and on) then it went blank again. It never did even try to load Windows. I have a 550W Antec PSU in it that ran my AMD 7870 fine. The card calls for a 500W PSU but I know 550W is cutting it close. Still, it should POST using just the onboard graphics. What are the odds of the PSU going bad after installing new hardware? :-\

:( My multi meter is down. I got a beep code (1 beep - DRAM refresh failure) when I took out all the memory and started it up so I don't know why I don't get any with the memory installed.

** I just bought an EVGA 80+ Bronze 700W, Power Supply at Amazon. I love Amazon Prime same day delivery. :)

I really don't think that will fix the problem but ya gotta start somewhere. ¯\_(O¿O)_/¯

For your problem, have you tried the GPU with the old CPU? 

Threw the i3 back in it (same - no POST).

Good thought though, thanks. :)

  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
Well, as I thought, it wasn't the PSU. I have 2 sticks of 4GB DDR3 memory coming on Monday. If that doesn't fix it I think I need a new motherboard. :-\

  • politically incorrect
  • *
  • Conservative
  • Sequoia
  • Posts: 3472
    • Male
Did you try it with just one stick of RAM?

  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
Did you try it with just one stick of RAM?

Yup, swapped the 2 sticks back and forth in the 2 slots.

  • Mandalorian Protector
  • Wand Holder
  • *
  • Ib'tuur jatne tuur ash'ad kyr'amur
  • Sequoia Supreme
  • Posts: 9717
    • Male
so you did try the new CPU with the old graphics? Sorry if confused, Ive been chasing my own issue..lol.

I got a new PSU myself, thinking that is the issue, EVGA 600w 80+ Bronze. Hooking it up later today. Hope it fixes my issue.

good luck with you issue, by process of testing it is starting to sound like the mobo may be the grumpy part...?

  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
so you did try the new CPU with the old graphics? Sorry if confused, Ive been chasing my own issue..lol.

I got a new PSU myself, thinking that is the issue, EVGA 600w 80+ Bronze. Hooking it up later today. Hope it fixes my issue.

good luck with you issue, by process of testing it is starting to sound like the mobo may be the grumpy part...?

Oh yeah, I tried every combination I could think of.

Good luck on your project.

Now I'm getting dizzy trying to find a socket 1155 motherboard.  :o

  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
I just ordered a motherboard. I hope the CPU I bought on ebay didn't fry the old one. :-\

  • Mandalorian Protector
  • Wand Holder
  • *
  • Ib'tuur jatne tuur ash'ad kyr'amur
  • Sequoia Supreme
  • Posts: 9717
    • Male
what version windows do you have? if it is Win 10 build 1607 (the anniversary update) then that is your problem.

It has to do with not being able to disable Secure Boot. 

  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
what version windows do you have? if it is Win 10 build 1607 (the anniversary update) then that is your problem.

It has to do with not being able to disable Secure Boot.

I have Windows 10 but it's not new, been there since the free upgrade from Windows 7. It was working before swapping hardware. I have the same Windows 10 on my main PC, the one I'm using now.

Regardless of the operating system I should be able to get to the BIOS.

I have a new motherboard but I'm afraid the ebay CPU may bork this board too. We'll see soon. :-\ 


  • politically incorrect
  • *
  • Conservative
  • Sequoia
  • Posts: 3472
    • Male
Stupid question maybe but you're positive the new CPU is an 1155 and not an 1156? And if it is an 1155 was it listed in the Motherboards QVL?

  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
Yeah, it's an Intel 2500K socket 1155. I put the i3 2120 back in it and it still wouldn't post.

  • Mandalorian Protector
  • Wand Holder
  • *
  • Ib'tuur jatne tuur ash'ad kyr'amur
  • Sequoia Supreme
  • Posts: 9717
    • Male
still double check your version, there are reports on number of tech sites of the things that the Anniversary Update killed (Skype webcams, GPU's, monitors). It has to with the WHLQ secure drivers. Win 10 requires them

  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
No, you would still get a POST screen even if you didn't have a HDD or SSD connected to the PC. And it worked fine before I changed out the hardware. Anyway, I bought a new motherboard, threw on the i5 CPU, new RAM, new video card and same old SSD with Windows 10 on it and now life is good. I got what I was looking for. The i3 - AMD 7870 benchmark is on the left, i5 - RX 480 on the right.


  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
I feel your pain. I just got a AMD RX 460 yesterday.  Wont boot up, just black screen.

Did you get it sorted? Was it the PSU?

  • Mandalorian Protector
  • Wand Holder
  • *
  • Ib'tuur jatne tuur ash'ad kyr'amur
  • Sequoia Supreme
  • Posts: 9717
    • Male
replaced PSU with a EVGA 600w. still wont POST. even unplugged the HD and only had the GPU plugged in to find out if it would POST, still wouldnt.

everything that I have read and what an IT guy at a computer repair shop said points to Win10 build 1607.

I have looked for a way to turn on the PCI-e slot in my BIOS, no luck.

  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
Intel CPU? Have you tried using the onboard Intel graphics? It could be a bad video card.

I think I'd find a new IT guy. If your problem just started after installing the graphics card I don't see how he can blame Windows 10.


  • MSN Groups Victim
  • **
  • .
  • Spruce
  • Posts: 808
    • Male
More and more, I'm glad I didn't upgrade to Win 10.

Of course, that doesn't solve the problems I've got with Win 7.

  • politically incorrect
  • *
  • Spruce
  • Posts: 1284
    • Male
You can get to the BIOS. I missed that. Is it EUFI? If you click on Boot in the BIOS can you see your hard drive? Try clicking on that and loading Windows from there.

I like Windows 10.