Hello,
I picked up this old family tablet, a huawei mediapad t3 10 ags-w09, that was sitting dead in some drawer.
I've been interested in electronics repair for quite some time, although so far I've only done simple jobs like smartphone screen or swollen capacitors, so nothing that required any kind of diagnostic ability, which is why I write this thread
So this tablet, when I press the power button, vibrates, screen displays some icon indicating a power issue, and turns off.
I left it on the charger for several minutes, no change.
Charger and cable are good, tested with other devices.
I open the tablet, disconnect the battery, and check voltage, it shows 3.4
I plug the battery, and check voltage between battery terminals (circled in red in pic) and ground, and now it shows 1.6V. No difference when the charger is plugged in.
I conclude from this that the battery is bad, since as soon as it's in circuit its tension collapses, and that it's not charging, since when I plug the charger i would expect to see >4V between battery and ground.
But i do not get why it's not coming on when the charger is plugged.
Before I try to source a new battery, how could I confirm the problem is not on the charging circuitry? Would it help if I bought some USB power meter?
Thanks for any kind of advice