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  1. HP 6720S starts with black screen

    No, it warms correctly. Cpu also. Unforunately got a pci post card, need e pcie. Ordered a "Compal Diagnostic test card laptop motherboard". It's on the way. Would you recommend any specific professional diagnostic card for laptop mobo ? Do you think that Northbridge might be so badly failing...
  2. HP 6720S starts with black screen

    Hp 6720s- platform: DDD UMA 6050A2137901-MB-A03 When started, fan spins continuously but no display on screen and external monitor. Current reading : 0.003-0.48 and stopped at 0.68 Steps made : Replaced ram, and cpu, with known good working ones, same problem. Flashed bios, reflowed GPU...
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