This switch won’t boot. Current draw ~0.4A
Hekate runs ok but freezes when trying to view battery info
RCM mode seems to charge battery normally (from 3.1V->3.9V in 1hr)
Emmc tested ok
Tested with good battery
No shorts found
Diode values around fuel gauge, BQ and M92 are okay
1V8, 3V3 lines ok, Sys line ok, ~13k ohms
Where do you think the problem is? Fuel gauge, BQ or something else?
Fuel gauge most likely at fault
Though looking at the reported temp might also be indacting the TMP IC is possibly at fault also (or the primary rail feeding it / or support circuitry)
Replaced the MAX17050 but no change
Where can I find the TMP IC?
It’s worth noting here that it’s quite rare two have to seemingly different faults (presumably at the same time) in very different areas of the board - which in this case is preventing boot (both of these faults could both prevent boot) so it’s entirely possible there is a more serious underlying issue, for example the next link in the chain which has commonality with both these areas such as the SoC for example
Can’t say I’ve ever encountered a faulty TMP IC before, though I have seen failure of the VIN line leading to it - IE: no continuity to the other areas of the board and in turn no voltage present at the TMP IC leg/s
I measured the T451 voltages and pin 8 (Serial Clock line, next to letter T) is ~60mV and should be 1.8V. The line goes under the SoC based on the board scans.
I see, probably indicating SoC related issue then I would guess joint issues are more likely though in this case, so perhaps a reball would resolve… though Idely I’d probably transfer it over to another board just to rule out any potential board level issues.
It’s been a while since I had to deal with a TMP related fault and could well be wrong but is there no pullup resistor to 1V8PDR for this line? If there is then that could be the problem… though, as I say, regardless, with that secondary fault it’s more likely to be a more serious underlying issue.