I'm upgrading a client's Dell E520 from a Pentium D to an E6600 Dual-core CPU.
With the E6600 CPU installed, I get no POST screen at all, and the monitor light blinks. Both fans (PSU & CPU) come on and the hard drive spins up.
To shut down I have to hold the power button in for 4-6 secs.
All my research insists that the E6600 is compatible with the Dell E520, and it's my understanding that the motherboard should automatically adjust from the old 800MHz to the new 1066MHz FSB speed.
I have updated the BIOS from 1.x to 2.4.
I've tried removing the battery for 15 minutes as well as shorting the CLRBIOS jumper.
I've spent hours on this, and am definitely stuck - all help gratefully appreciated!