Hi guys i'm posting here because I think that there's a battery or BMS issue even do the problem is with a pure discovr smart speaker found with one battery at 1.6v and the other at 3.2 v not drawing any current from the type c port. The speaker was new and unused , my guess is that the BMS is somehow in protection mode or something, I have tried to disconnect the wires from it charge the batteries from the lab PSU and reconnect them and still not charging after that.What should I Try? I also bought another bms that you can see in the pictures but i have this white wire coming from the usb type c to the old bms on the point called VM or voltage monitor and i don't have that point on my new bms, i have also helped the other battery to reach 3.2v with a power bench but still nothing.
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Looking for some help with this one if anybody can assist please? I have an HP Probook 470 G4 Laptop which recently started to intermittently failing to turn on, with intermittent white LED light(charging LED) by the charging port when it should have been charging and showing an orange LED instead. Definitely some sort of gradual failure. Now the laptop fails to power on at all, no charging LED, no Power Button LED either - seemingly dead.
Stripped down to the bare motherboard. The original HP battery, when disconnected from the motherboard, is reading 0.00v - possibly some sort of protection... -
Have hp laptop motherboard part no opp 17 diner skl/kbl 15289-2 with charging problem.the laptop shows plug in charging but percentage doen not increases.the schematic or boardview is not available.
Charging ic is bq737 with voltages on pin no
1&2 -19v
34&5 -0v
6 -2.56 v
7- 0v
8&9 -3.15v
10 -0v
11 -0.18v
12 & 13 -13v
14&15 -0v
16 -6v
17;18&19 -13v
20 - 19v
Voltages on battery connector are
1&2. -13v
3&4 -3.14 v
5&6 -0v
8&9 are ground... -
Hello guys,
I have a problem with charging circuit in this laptop. Unit came with no power at all (USB-C meter was cycling turning off and on). I discovered that when I unplug battery laptop works on charger only. So after few measurements I found shorted 1st dual mosfet AONY36324. Unfortunately i was not able to order exact this one, so i ordered AONY36352 which i believe is the similar one. Now the problem is, when i connect battery and charger USB-C meter is not cycling anymore, it starts charging (reading 20V@2,7A) but after few seconds it is going down to 20V@0,20A and laptop... -
Hello Guys,
I received Toshiba Qosmio X755 that has a charging problem and I'm stuck trying to figure out the problem.
- When battery is unplugged i works without any problem.
- When I plug in the battery after plugging in the charger, it works correctly and the battery is charging.
- When I plug in the charger after inserting the battery, it stops working. ( voltage dropped and consumed 8A, reaching the maximum capacity of my bench power supply for 5 seconds, and stop working after )
Can you help me diagnose the problem? I have attached... -
I have a strange problem with my iPad Pro 12.9 4Gen / A2229. When I start the device, it stays on the Apple logo, but when I heat the back of the device with a hair dryer, the device boots, but this time there is an interesting problem. The iPad is charging, but there is no USB data on the computer. The USB charging port has been changed and the chips seem normal, but I have given it to 2 different Apple services in Latvia, but the repair could not be done. Is there anyone who can help with this? Can someone support the repair by sending only the motherboard within Europe? Thank you.