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Dell Precision T3500 boots fine.

Upon, reboot the system bios beeps: 1-3-2. In other words, beep (pause) beep-beep-beep (pause) beep-beep. Nothing. No bios. Just black screen.

The only way to get it to reboot properly without the bios beeps is to yank the power from the computer. Wait till the electricity discharges from the motherboard by holding in the power button. Plug the system back into the power. Press the power button.

But here's how to fix:

• -upgrade the bios.
• -reset to defaults.
• -turn off the FAST BOOT.
• -disable the DISKETTE DRIVE.
• -uncheck the ONBOARD OR USB FLOPPY DRIVE.
• -uncheck the ONBOARD OR USB CD DRIVE.

While we are at it, change the silly default options:

• -disable LOW-POWER-MODE.
• -enable HYPER-THREADING (if you have it).
• -enable MULTICORE.
• -enable TURBOBOOST.
• -disable SPEEDSTEP.
• -enable SMART TEST.

There could be other reasons. For me, this was what worked. The key seemed to be something in the FASTBOOT and the DISKETTE DRIVE.

NOTES:

• -this was a 6 month process :-(
• -replacing the 525W power supply with a 850W power supply didn't work.