8 Krypton

Re: No signal Dell Precision T1650

Two additional tips:

  1. Remove anything not required to boot the workstation (i.e., start with just the PSU, motherboard, monitor, a single memory module and a USB keyboard); if it boots add additional hardware (HDD/SSD, ODD, cards...) until you find the problem.
  2. Test the PSU; I understand your workstation has a test button on the PSU.  Use it.

Hope this helps.