bjf
Member
Magsafe light is on. No fan. 3v42 is stable. PPBUS_G3H is stable. 3V3 and 5V are all jumping up slightly - S5, S3 and S0. Continual pulsing on L7520. No signs of life on CPU VCORE when plugging it in - no voltage pulse at all. Checked all the SPI ROM data lines. U1950 looks good and is getting stable 3V42 on pin 8. Any thoughts on where to go next?