Installed new CPU, PC starts but displays nothing. Please help!

Page 2 - Seeking answers? Join the Tom's Hardware community: where nearly two million members share solutions and discuss the latest tech.

jude_mcgowan

Prominent
Jan 8, 2018
14
0
510
Thanks for taking the time to read this, any help would be much appreciated:)!.

PC Specification
OS / Windows 7 64-bit
CPU / Intel i7-4770 @ 3.4GHz ( upgrading to i7-4790k)
RAM / 2x Kingston 8GB DDR3
Motherboard / ASUS 787M-PLUS ( BIOS version 1107)
GPU / NVIDIA GeForce GTX 1070
PSU / Corsair VS450

Problem
I installed my new CPU today and was faced with the problem of the machine powering up (fans, LED's etc. all powering) but there was no display on the monitor, nor was there any beeps coming from the machines internal speaker.

Solutions I have tried(none of which have worked)
-I have triple checked that the CPU is seated correctly as well as all other components (RAM, GPU).
-I have tried the one stick of RAM trick (I have also removed both RAM sticks to hear for beeps on power up; nothing).
-Flashed the BIOS.
-Cleared the CMOS (also removed battery after clearing CMOS was unsuccessful).

Things to note
-CPU 8 pin plug is connected (plugged in).
-My DVI cable is plugged into the GPU, I have also tried it in the iGPU but to no avail.
-The CPU pins are not bent.
-I haven't tried the CPU in a different system, I'm going to ask my friend with a similar build if I can try the CPU in his PC (hopefully that diagnoses the problem).
-As far as I'm aware my PSU should be powerful enough for the build, but I could be totally wrong.
-I'm currently writing this from my PC with the i7-4770 back in. Everything is booting up fine and working as normal. Hopefully that eliminates the monitor, MOBO, GPU and RAM from being the issue.
-When I boot the machine with the i7-4770 in, I hear a single beep and the DRAM LED within the machine also powers on red. None of this happens when I attempt to make it to POST with the i7-4790k installed.

If you've made it this far thanks very much for having a read. Any suggestions are more than welcome. It's currently 12:35 am so I'm going to sleep on it and see if I can research anything else I haven't tried tomorrow.

P.S If the solution is something simple, or even worse something I have previously tried (badly in that case) then you have my sincerest apologies:lol:!


 
Solution
So, to update the BIOS on a Z87, you need:

a) a working PC with an Intel Processor of the old batch (eg. I5-4430)
b) download and install the Intel MEI (Management Engine Interface) from Chipset Tools.
c) download Asus_BIOS.....new_4th_Gen... etc. tool
d) download the last BIOS release (2103)
e) Flash the BIOS with the ASUS Tool and not from UEFI
f) Install the new Processor (I7-4790K in my case)

At the post, the BIOS is now "2103 64" and not 2103.

This is what I found. Not sure why bios versions are different, but wondering if since you are using 1107 that's a bios that only updates the z87m boards for Haswell and not the refresh, which would explain why the 2103 version works for a 4770 and not a 4790k...


Yeah I'm starting to think the same. I tell you what if you're able to get it working you can keep it:lol:
 
So, to update the BIOS on a Z87, you need:

a) a working PC with an Intel Processor of the old batch (eg. I5-4430)
b) download and install the Intel MEI (Management Engine Interface) from Chipset Tools.
c) download Asus_BIOS.....new_4th_Gen... etc. tool
d) download the last BIOS release (2103)
e) Flash the BIOS with the ASUS Tool and not from UEFI
f) Install the new Processor (I7-4790K in my case)

At the post, the BIOS is now "2103 64" and not 2103.

This is what I found. Not sure why bios versions are different, but wondering if since you are using 1107 that's a bios that only updates the z87m boards for Haswell and not the refresh, which would explain why the 2103 version works for a 4770 and not a 4790k.

http://www.asus.com/microsite/2014/MB/New_4th_gen_Intel_processor_compatibility/Download/ASUS_BIOS_Update_tool_for_new_4th_Gen_Intel_Core_processors_in_8_Series_motherboards_SOP_final.pdf
 
Solution


That solved it, thanks! I actually installed BIOS version 1105 but followed everything else you said and that got it running. Massive thank you😀!
 
Yeah, from what I've been reading there's been some issues with how the bios is updated between the Haswell and Refresh cpus. The new bios updates are writing the new bios, but basically not the new cpus, so even though the version is correct, the Refresh cpus aren't being recognized.

Great that it works 😀