Help ! Upgraded PC will not boot

Lee

Lee

Lee

Associate
Joined
21 Dec 2006
Posts
478
Location
Northampton
Hi guys, looking for some help on this one. I've just upgraded the father-in-laws PC (his old one had a strange overheating issue, see this thread https://forums.overclockers.co.uk/showthread.php?t=18723989).

I've replaced the motherboard, CPU and RAM (all for OCUK) so his spec is now:

Asus Z170 Pro Gaming Intel Z170 (Socket 1151) DDR4 ATX Motherboard
Intel Core i5-6400 2.70GHz (Skylake) Socket LGA1151 Processor - Retail
Kingston Fury Black 8GB (2x4GB) DDR4 PC4-21300C15 2666MHz Dual Channel Kit - Black
OCZ StealthXStream 2 500W PSU
Cooler Master Elite 330 Midi Tower Case

There is also a DVD drive and 2 HDD's attached.

For the first time ever (I've built 4 PC's to date, this will be the 5th) I have a problem. The machine will not power on. The LED's on the system board are lit when I connect the power, but the machine will not power on by pressing the power switch. I've triple checked and reseated all connections including power connectors on the board (both of them) and the case power switch jumpers.

I'm now at a loss, I can see the board is getting power and the power switch was working 3 days ago when I last powered on his old rig.

Does anyone have any ideas ?
 
Did you remove the power switch connecter from the board and jump the 2 pins with a screwdriver or something to rule out the switch? If that fails try it outside of the case to rule out any short.

Its also possible you may need a BIOS update for the 6400. Can be done using Flashback.
 
The LEDs on the board being lit but system not powering on at all (no fans etc) can often be a sign of corrupted BIOS settings in the CMOS memory (can happen for whatever silly reason).

Read the motherboard manual for information on how to physically clear the CMOS and reset. On Asus boards there's sometimes a little plastic cap on two of three pins somewhere, and you lift off and replace the cap one pin to the side, wait 5-10 seconds (all this with power completely off, power cable unplugged too). Then put the cap where it was originally. But the manual will confirm - your board may have a fancier way of doing it. Failing that, there's always the remove battery method.
 
I'd take the motherboard out of the case and put it on a wooden table or the box for the motherboard, then short the power switch pins with a screwdriver. The Asus Z170 Pro Gaming has diagnostic LED's in the top right of the motherboard which should help identify why its failing.
 
Sounds like a short. Take it out of the case and build on the MB box.

Only attach the following. One stick of RAM, CPU, CPU cooler, PSU. Start the system by shorting MB power pins.

Report back.
 
Guys, thanks for the advice so far. Will be looking to try it tonight after work.
 
Ok guys, firstly many thanks for your advice. I have the PC now working with Windows installed.

If you're sitting down I'll let you know what the problem was........

Unbelievably I'd connected the PCI-E power connector into the EATX socket on the motherboard.....doh ! The light must have been bad. Anyway I connected the correct power lead (only 4 pin, PSU doesn't have an 8 pin version which I think added to my confusion) and power up and POST straight away !

Panic over, just need to upgrade to Win 10 and copy all his data back.
 
You must log in or register to reply here.
Back
Top Bottom