Strange PSU/mobo problem

[IAmATeaf]

After thinking that the power switch on my case was faulty as when the PC was left powered off at the mains overnight the next day it would take 5-6 presses of the power button on the case before it booted, it turns out that the case power switch is fine.

Now my son noticed that the green LED on the mobo would take around 10-15 seconds to light if the PC is left off at the mains overnight. Once the green LED is lit pressing the power switch on the case boots the PC. If I then shutdown, turn off the mains and say wait 5 minutes the green light will come on almost imediately.

Once the PC is up and running it runs fine in both normal use and games. To me it looks like something in the PSU is discharging overnight and taking a lot longer then normal to get up to speed the next day. Any PSU experts out there point me to what to look out for inside the PSU also I don't have a spare PSU to test with unfortunately so am a bit stuck.

 

[IAmATeaf]

Well I've check the PSU out and that's fine, if I short the green and black wires together the PSU even after being left off overnight switches on instantly. Also the purple wire which supplies +5v to the mobo is at 5v as soon as it's switched on.

Going to try the tests again tomorrow morning just to make sure but it's looking like it might be the bloody mobo , anybody know how long the warranty on a gigabyte mobo is? First time ever I've purchased a gigabyte, have always used Abit or Asus which have never failed on me so am not too happy a bunny

 

[IAmATeaf]

Well I managed to solve this and thought I'd post in case the answer may be of use to other.

Tested the PSU the next day and it's fine so I sent Gigabyte an email, their response was 'what green light?', the 1 on the mobo I said, can you take a pic and email to us please. Went to take a pic and it turns out the green LED is on my bloody TV card. Seems the card has a feature where it can turn the PC on at scheduled times, this feature was enabled but I hadn't cabled the card up, a few moved jumpers later on the TV card to disable this feature and everythings now working as it should.

Feel a slight numpty though and also doesn't explain why the PCs been fine for all these months but problem fixed.