Boot tone is present and screen lights up, but nothing is displayed on screen
Reset Cuda chip. (Refer to The Cuda Chip in Basics for instructions.)
Reset logic board. (Refer to Resetting the Logic Board in Basics for instructions.) Replace monitor cable.
Test with known-good monitor. Replace monitor if necessary. Refer to appropriate monitor manual to troubleshoot defective monitor.
Replace processor card.
Replace logic board. Retain customer's DIMMs.
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