Dell D620 boots up fine execpt for the display is fuzzy on the LCD screen. Works fine when connected to the external monitor. I was sure the issue this the LCD panel. Tested with known good LCD ribbon cable, same issue. Tested with known good inverter, still the same. At this point everything points to a defective LCD panel. Got a known good LCD panel from another Dell D620. Guess what, same thing on the known good LCD panel. Since this model is known to have issue with the Nvidia graphic chip I decided to give it a reflow on the GPU and see what happens. After the reflow the laptop displayed video correctly on both LCD and external monitor.

Display on LCD screen is fuzzy.



 

Looks fuzzy in BIOS as well.

 

Display look good on external monitor.