can any one help us with charging problem
bq737 ic was damage i changed it but now plug in charging,but percentage not going up laptop 5558
bq737 ic was damage i changed it but now plug in charging,but percentage not going up laptop 5558
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Re: La-c701p charging problem
Where is the measurement of all pins of charging IC?? -
Re: La-c701p charging problem
i have the same problemComment
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Re: La-c701p charging problem
1. ACN - 19v
2. ACP - 19v
3. CMPOUT - 0V (0)
4. CMPIN - GND
5. ACOK - 0V (0)
6. ACDET - 2.45V
7. IOUT - 0V (0)
8. SDA - 3.24V
9. SCL - 3.24V
10. ILIM - 2.96v
11. BM# - 3.22v
12. SRN - 14.74v
13. SRP - 14.74v
14. GND
15. LODRV - 0V (0)
16. REGN - 5.91v
17. BTST - 14.43v
18. HIDRV - 14.77v
19. PHASE - 14.77v
20. VCC - 19vComment
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Re: La-c701p charging problem
I would recheck if the chip has been soldered correcty - Pin 5 ACOK should be around 3vComment
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Re: La-c701p charging problem
ACOK is active low on bq24737.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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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... -
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... -
I ordered a Bluetooth earbud one and half year ago, and right earbud broke. The light that should have been red when you put it in the charging case started to turn blue continuously(which means earbud is not charging) and after 1 week the earbud completely died. I disassembled right earbud because the warranty finished. I diagnosed the battery was dead, so I charged it with TP4056 and revived the battery.
Right earbud is working now but I still didn't solve charging problem. I checked the charging box with a multimeter. There is 5V. I checked the headphone pins and they are working.... -
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.
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