tcampbell34
Member
I got a 820-00923 that originally did not turn on at all. PP3V3_G3H was shorted to ground and I found corrosion on CB300. I removed CB300 and the short was gone. Replaced CB300 and now diode mode was around .360 on pp3v3_g3h and it turned on. I originally tested it without the battery and it booted to the OS, and everything was working fine. Then I connected the battery and all of a sudden, it does not boot to the OS anymore, and instead I get a flashing folder on the screen. I compared voltages on the connections on J9600 with and without the battery, and the only difference is the CLKREQ signal is low when the battery is connected, but high when its not connected. The rest of the board looks cleans, so not sure what could case this. I tried 3 different batteries and got the same problem with all of them, so its definitely a board issue.
Without Battery | ||||
PP5V_S4 | 5.14v | PP5V_S4_P2V7NAND_LB | 5.13v | |
SSD_BOOT_L | 1.762v | SSD_BOOT_LB_L | 1.733v | |
SSD_PWR_EN_L | 0v | SSD_PWR_EN_LB_L | 0v | |
STORAGE_EN | 3.327v | STORAGE_LB_EN | 3.329v | |
SSD_RESET_L | 3.3v | SSD_RESET_LB_L | 3.28v | |
SSD_CLKREQ_L | 3.32v | SSD_PCIE_CLKREQ_LB_L | 3.3v | |
SSD_SR_EN_L | 3.292v | LPSR_EN_LB_L | 3.25v | |
PP3V3_S5 | 3.358v | PP3V3_S5_SSD_LB | 3.3v | |
With Battery | ||||
PP5V_S4 | 5.14v | PP5V_S4_P2V7NAND_LB | 5.13v | |
SSD_BOOT_L | 1.762v | SSD_BOOT_LB_L | 1.77v | |
SSD_PWR_EN_L | 0v | SSD_PWR_EN_LB_L | 0v | |
STORAGE_EN | 3.327v | STORAGE_LB_EN | 3.329v | |
SSD_RESET_L | 3.3v | SSD_RESET_LB_L | 3.3v | |
SSD_CLKREQ_L | 95mv | SSD_PCIE_CLKREQ_LB_L | 95mv | |
SSD_SR_EN_L | 3.292v | LPSR_EN_LB_L | 3.29v | |
PP3V3_S5 | 3.3v | PP3V3_S5_SSD_LB | 3.3v |