Hello Everyone !
I have a problem with a Switch Lite that won't start... but charging
The USB-C port and M92T36 have been successfully replaced, as it now displays 15V and 0.520A on the USB-C tester (before replacing the components I had different values).
I should also mention that the BQ24 is working => 15V input on VBUS, 4.2V output on VSYS and VBAT
I tested all the components on the APU power rails in diode mode; all good.
Same for the components around the BQ, M92T, and the two Max chips; all good.
I don't detect any hot spots, whether leaving the board connected to the USB-C charger or injecting current to perform the isopropyl alcohol test.
I noticed that around the Max chip, just below the APU, quite a few components seem to be shorted. But I think they have such low resistance that they behave as if they're shorted. Is it possible to confirm this?
So I installed Picofly to see if the problem might be with the APU or the eMMC, which could be corrupted. Soldering is fine (measurements of the points are correct), and I tested the Picofly on another Switch; it's healthy (and vice versa, the other Switch's Picofly on this motherboard).
I'm getting the following blink:
a blue LED (normal)
then this cycle repeats three times in yellow: short, short, long
With both Picoflys (which work on the other Switch), I get this error code.
**= No eMMC block 1 read (should not happen)
I don't know if I should try reflowing or reballing the eMMC chip, look for a short circuit, or replace one or both MAX chips.
Can someone help me ?
Thank you in advance
I have a problem with a Switch Lite that won't start... but charging
The USB-C port and M92T36 have been successfully replaced, as it now displays 15V and 0.520A on the USB-C tester (before replacing the components I had different values).
I should also mention that the BQ24 is working => 15V input on VBUS, 4.2V output on VSYS and VBAT
I tested all the components on the APU power rails in diode mode; all good.
Same for the components around the BQ, M92T, and the two Max chips; all good.
I don't detect any hot spots, whether leaving the board connected to the USB-C charger or injecting current to perform the isopropyl alcohol test.
I noticed that around the Max chip, just below the APU, quite a few components seem to be shorted. But I think they have such low resistance that they behave as if they're shorted. Is it possible to confirm this?
So I installed Picofly to see if the problem might be with the APU or the eMMC, which could be corrupted. Soldering is fine (measurements of the points are correct), and I tested the Picofly on another Switch; it's healthy (and vice versa, the other Switch's Picofly on this motherboard).
I'm getting the following blink:
a blue LED (normal)
then this cycle repeats three times in yellow: short, short, long
With both Picoflys (which work on the other Switch), I get this error code.
**= No eMMC block 1 read (should not happen)
I don't know if I should try reflowing or reballing the eMMC chip, look for a short circuit, or replace one or both MAX chips.
Can someone help me ?
Thank you in advance
