New
#1
Boot loop
I switched on my Sandy Bridge today to do some work on it and it is in some sort of boot loop - all fans and what sounds like it looking in the optical drive for a boot source commence then stop for a few seconds then the loop starts all over again. There is no RAM beep and no graphics in fact nothing hooked up to the machine at all so I cannot even get into the BIOS.
I have tried reseating the RAM (very difficult under the large cooler) the graphics card and generally checking around inside the case and the only thing I can see are the lights on the fans and four very small LEDs that are lit up two red two green as in pic.
The odd thing is I have no beep and that the boot attempt will only stop if I disconnect form the mains power supply. Using the power button does nothing. I do seem to remember from a long while ago something about those LEDs that are lit up but all Googles have come up nothing.
The board is a Gigabyte GA-H67A-UD3H with 8GB on board and an i5 2500 CPU GTX 650Ti card PSU is fine I think - Corsair HX 650
Any ideas please because this machine has been a non problem since I built it.