Good afternoon! Hp 6720s- platform: DDD UMA 6050A2137901-MB-A03 with display fail. 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 for test purpose to no avail. Measured : -CPU voltages : Vcc_Core :+1.12V VCCP : +1.18V +V1.5S : +1.7V a little high H_Pwrgd : +1.18V H_Cpurst# :+ 1.8V GPU voltages : +1.18V; +1.44V; +2.08V All other voltages are present and measured good except : -At CN17 (lvds connector) : +V3A(pins 18-19-20) is missing due to "LVDS_VDD_EN" absent. LVDSA_DATA pins signals are also absent. -Bios (soic8) pins 1 and 2 always 3.54v strange !!! Please advise as where to dig further ! Bios, I/O or other component !
