Computer receives power but no BIOS

[NicholasJB1996]

So this has been happening for a while, one day I tried booting up my pc, I'm getting power to the CPU fan, system fan, all leds are lighting but no display on monitor (usually keyboard lights up when I get BIOS) it doesn't light up. I read on some forums that a failing PSU can cause this problem so I purchased a new EVGA 600W PSU. Got the PSU today and installed it. Still the same problem. (Note: Sometimes the PC does manage to boot) It eventually booted up tonight after a few hours of constantly switching off PSU disconnecting cables and switching ram slots. Could it be that my CPU is failing or a stick of ram could be faulty?

 

[RARRAF]

And here's my pc specs:
CPU:
Motherboard:
RAM:
GPU:
HDD:
PSU:
OS:
HWINFO from here https://www.hwinfo.com/download.php

 

[NicholasJB1996]

And here's my PC specs:
CPU: AMD Phenom II X4 945
Motherboard: GIGABYTE GA-78LMT-S2
RAM:4GB Kingston DDR3
GPU: EVGA GeForce GTX 1050Ti FTW
HDD: Seagate 500GB
PSU: EVGA 600W
OS: Windows 10

 

[RARRAF]

http://www.tomshardware.co.uk/forum/261145-31-perform-steps-posting-post-boot-video-problems?_ga=2.172492131.1346157551.1498577144-1348562272.1498577143
it maybe an idea to buy a system speaker 17 help pin point what is the exact problem.

 

[13thmonkey]

Have you plugged in your PCI-E cables to the PSU and the GPU, on another thread you weren't sure if you needed to.

 

[NicholasJB1996]

I had a speaker in the computer and it disappeared somehow T_T
I also plugged in my PCI-E cables, I'm sure it's needed (I read the installation booklet) xD
Currently trying to boot (2 Attempts made so far and no BIOS)
UPDATE ON SOME PARTS:
RAM: Kingston KVR1333D3N9/4G
PSU: EVGA 600 B https://www.amazon.com/gp/aw/d/B00EON40CS/ref=mp_s_a_1_1?ie=UTF8&qid=1499966672&sr=8-1&pi=AC_SX236_SY340_FMwebp_QL65&keywords=evga+600b&dpPl=1&dpID=51Zd5PuGxSL&ref=plSrch
HDD: WD5000ABYS
https://www.cnet.com/products/wd-re2-wd5000abys-hard-drive-500-gb-sata-300-series/specs/

 

[NicholasJB1996]

I just tried booting up my pc again (stopped counting the number of times) so I'm pretty sure it's either the board or the processor. When the pc is running(no BIOS but it gets power to everything else fans, GPU, HDD) the GPU heats up fairly quickly and so should the processor. I switch off the PSU and quickly removed the heatsink off of the processor but the processor is still ice cold. Which is it processor or board?

 

[13thmonkey]

You need to tell us what you have plugged in where.

 

[NicholasJB1996]

I have a three pin system fan plugged into SYS_FAN.
USB plugged INTO F_USB1
Power switch plugged into PW
LED plugged into HD
Speaker plugged into SPEAK
LED plugged into PWR_LED
HDD plugged into SATA
CPU fan plugged into CPU_FAN
CPU plugged into ATX_12V
ATX cable plugged into ATX
GPU plugged into PCIEX16

 

[13thmonkey]

And you have stand-offs under the mobo? or dimples on the mobo tray?

 

[NicholasJB1996]

I'm seeing the standoffs in the case, I removed the board from the case and attempted breadboarding with just the speaker, CPU and a stick of ram. I used an old no brand PSU, upon booting the fan spun a half a rotation and stopped. Using EVGA PSU the span started spinning then lost power for a little and started spinning once more(still no bios).

 

[NicholasJB1996]

No one is willing to help my problem? It still exists.

 

[13thmonkey]

So, in and out of the case you get only a fractional spin of the cpu fan on two different psu's? And the gpu fan spins up.

I'd suggest cpu or mobo, but you won't be able to determine which without a cpu to test.

To be sure the cpu is on the cpu list for the mobo correct?

 

[NicholasJB1996]

At that time yes, the fans would barely spin. Recently the fans have been spinning at full speed using the EVGA PSU no fluctuations in its speed. The GPU fan spins. I have a CPU to test but is currently in another PC (I'm waiting on the owner to replace the pc which should be soon, so I'll get the CPU from it and test it on my mobo) yes the cpu is on this list for the Mobo.

 

[13thmonkey]

and your monitor is plugged into the GPU

 

[NicholasJB1996]

Yeah it's plugged into the HDMI port on the GPU

 

[13thmonkey]

I'm going through the daft options, all HDMI ports tested? different HDMI cables tested. GPU in the first PCI-E slot?

 

[NicholasJB1996]

I only tried one HDMI port on GPU and Mobo has only one PCI-E slot. Might I add the past few days the pc started up and was running pretty good despite having to attempt powering on twice. The PSU is brand new as well as the GPU. I'm currently trying to boot the PC, and its not even posting. Yesterday it took three attempts to boot, which it did on the third try, I got a single beep which I believe means it booted successfully.

 

[13thmonkey]

so by 'running pretty good' do you mean you can log into an run windows etc.?

 

[NicholasJB1996]

Yeah it booted up, played some games, was running smoothly. Then I tried to boot up today was unsuccessful until just now, the pc is currently running but I have no idea what is causing the issue. If any parts have to be replaced to solve this problem I'm willing to replace it to rid of the frustration of having to boot multiple times.

 

[13thmonkey]

I'd put money on the PSU, but it shouldn't be too heavily loaded even if it is one of the worse EVGA units, no idea if it is as I've not got that detail.

 

[NicholasJB1996]

The EVGA PSU is brand new, I purchased it because I believed my old PSU was causing problem, but it wasn't the PSU since I'm using the EVGA and getting the same problem. To be honest that old PSU won't even spin the fan in the computer. This is a brand new EVGA 600B 600 watt PSU.

 

[13thmonkey]

An intermittent failure to start is a pain to diagnose, daftest suggestion yet, is it the power switch? can you start it by shorting the power on switch pins on the mobo? If you don't know what that means then I suggest not doing it without a lot of research.

 

[NicholasJB1996]

I know what it means lol I'll find some wires and short the pins PW pins on the Mobo. I swear if it's the power switch....

 

[NicholasJB1996]

Not the power switch. Shorted the pins, same problem, power to fans, GPU, HDD, just not the processor (I removed the heatsink and started) cold as ice. I'm beginning to wonder if it could be the CPU power slot for the cable. I recently encountered a board (pc which I'm supposed to get the processor to test) the board does not power the cpu fan which made it overheat several times and shutdown. I diagnosed it to be the board as the fans spun up on my board but when I plugged in my CPU fan om that board it didn't spin at all. No power whatsoever.