Another board from my "tough" pile. This board has good green/orange light, powers on, all rails present (including vcore @ 1.76v), but it has no chime and no video. I thought it might be a BIOS/SPI ROM issue, and I noticed that I get 3.3v on pins 1, 2, 3, 7 and 8 of U6100, but not on pin 5 (SPI_MLB_MOSI) or 6 (SPI_MLB_CLK). I actually don't have a working board to compare values, but I believe those should be 3.3v, correct? I actually tried 3 known-good dumps from other boards of the exact same model (2014, 1.4, 4GB) without luck. Same exact issue, so I don't think the BIOS is communicating properly with the PCH.
I get 0v at R6111 pin 1, R6112 pin 1, R6115 pin 1, and R6116 pin 1. All resistors in this circuit measure properly.
All other voltages present and look good. PCH gets appropriately warm. Any ideas here? All help appreciated.
I get 0v at R6111 pin 1, R6112 pin 1, R6115 pin 1, and R6116 pin 1. All resistors in this circuit measure properly.
All other voltages present and look good. PCH gets appropriately warm. Any ideas here? All help appreciated.