Bouba148
New member
Hi Team,
This board came with a WD and not turning all at all, so I replaced many components ( I can provide the list if needed )
Now It doesn't boot on the OS from the ssd but boots from usb and once booted from usb it can see the ssd.
So the ssd is not detected in bios mode but detected in OS mode.
mesurements with ssd plugged in at U3740 are ok:
pin 1 = 3.42v
pin 2 = 1v
pin 3 = 3.3v
pin 4 = 3.42v
pin 6 = 3.24v
pin 7 = 0
pin 8 = 0
PP3V3_S0SW_SSD_FLT: 3.3V
SSD_PWR_EN: 3.250V
Checked all the PCIe data capacitors all are ok: resistance beween pin 1 and 2 around 2.5 MOhms for all 8 capacitors.
What are the signals to check in bios/spi mode? is it the smc that controls that ssd during the boot sequence or the SPI?
Maybe corroded or broken trace somewhere around that area.....
Thanks
This board came with a WD and not turning all at all, so I replaced many components ( I can provide the list if needed )
Now It doesn't boot on the OS from the ssd but boots from usb and once booted from usb it can see the ssd.
So the ssd is not detected in bios mode but detected in OS mode.
mesurements with ssd plugged in at U3740 are ok:
pin 1 = 3.42v
pin 2 = 1v
pin 3 = 3.3v
pin 4 = 3.42v
pin 6 = 3.24v
pin 7 = 0
pin 8 = 0
PP3V3_S0SW_SSD_FLT: 3.3V
SSD_PWR_EN: 3.250V
Checked all the PCIe data capacitors all are ok: resistance beween pin 1 and 2 around 2.5 MOhms for all 8 capacitors.
What are the signals to check in bios/spi mode? is it the smc that controls that ssd during the boot sequence or the SPI?
Maybe corroded or broken trace somewhere around that area.....
Thanks