Having problems getting this laptop to power on with just the battery. I have swapped the charging chip BQ24760 out but it's exactly the same. Voltages in the picture are whilst plugged in to charger. Are they correct?
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Acer not working off battery
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Re: Acer not working off battery
Many thanks for your response Techtiger. They both measured 2.7v and PU4002 has 19v on the other side. I swapped out PU4002 and it was showing 2.9v until I connected the battery then went back to 2.7v. Still shows 2.7v with battery connected and disconnected.
Is this going to be a case of swapping out PL4002 at the same time as PU4001 and PU4003?
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Re: Acer not working off battery
Did you try to replace the battery?OpenBoardView — https://github.com/OpenBoardView/OpenBoardView
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Re: Acer not working off battery
Originally posted by techtiger View Posttest BQ24760 working conditions pin
2 4 5 8 15 36 42 for voltage after test coil PL4002 For resistance
The pins of BQ24760 are a bit confusing. There are only 40 pins that I can see although the schematic says there are 43. I have taken the measurements of the numbers you've asked for where pin 1 = the white painted arrow on the board and the pin 42 you ask for I've given you pins 39 and 40.
2 = 0v
4 = 2.6v
5 = 0.1v
8 = 3.4v
11 = 2.8v
15 = 6v
22 = 2.8v
36 = 19v
39 = 3.3v
40 - 0.5v
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Re: Acer not working off battery
Originally posted by mosfetratus View PostTry measuring battery plugged out. Could be battery is dead. If you have no voltage, that means battery protection circuit is shut, because battery is discharged to the point of being dead.
That means, new battery.Last edited by kalemaroni; 03-31-2019, 06:19 PM.
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Re: Acer not working off battery
Originally posted by brew99 View PostDoes the laptop give you any LED indications for the battery status when plugged into charger? Solid/flashing battery LED? As Piernov suggested, try different battery as that 2.7V is way undervoltage for a 2s battery.
The only battery I've managed to find is China and I'm waiting to hear back from the customer as to whether he wants me to order one.
What should the 2.7v be - 8.4v I'm assuming?Last edited by kalemaroni; 03-31-2019, 06:33 PM.
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Re: Acer not working off battery
Originally posted by SMDFlea View PostOn some acers there`s a small micro switch that presses in when you fasten down the cpu/mem cover. With cover off the switch is up,the battery doesn`t charge.
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Re: Acer not working off battery
Originally posted by ktmmotocross View Posttry to charge battery with PSU, check thread called "battery charging with psu"
2,7V is way low. when u have good voltage on it even charging may start work
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Re: Acer not working off battery
did u try to trigget battery charging switch pin?Last edited by ktmmotocross; 04-01-2019, 06:38 AM.
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Re: Acer not working off battery
Originally posted by kalemaroni View PostAny idea what that switch looks like/where it is/what it's called on the schematic?
http://tipstash.blogspot.com/2014/08...at-random.html
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