Laptop won't power up with AC adapter and won't charge battery
Tags:
- Battery
-
Laptops
- Power Up
- Motherboards
Last response: in Laptop Tech Support
pepi93
January 3, 2014 8:55:49 AM
1) the laptop doesn't power on without a battery
2) the light which would indicate that the laptop is plugged into the ac adapter is not on when the ac adapter is plugged in.
3) the battery charge light is also not on, which would indicate the battery is being charged.
The battery does not charge...
The AC adapter is fine, tested with other laptop.
The battery is also new and works fine
I took the laptop apart. Took out the DC Jack and tested it separately.
I used a crappy non digital volt meter. Set it to 50 DC V. Plugged the DC Jack into the AC adapter...
There are 2 red 2 black. Each red shows 8V exactly.
I plugged the dc jack into the motherboard with the AC adapter connected, with the motherboard out and proceeded to test the various contact points on the 4 pin connector with the dc jack plugged in. I tested contact points on both sides of the motherboard on the soldering points. Each time getting the 8V reading.
Thanks for the help
2) the light which would indicate that the laptop is plugged into the ac adapter is not on when the ac adapter is plugged in.
3) the battery charge light is also not on, which would indicate the battery is being charged.
The battery does not charge...
The AC adapter is fine, tested with other laptop.
The battery is also new and works fine
I took the laptop apart. Took out the DC Jack and tested it separately.
I used a crappy non digital volt meter. Set it to 50 DC V. Plugged the DC Jack into the AC adapter...
There are 2 red 2 black. Each red shows 8V exactly.
I plugged the dc jack into the motherboard with the AC adapter connected, with the motherboard out and proceeded to test the various contact points on the 4 pin connector with the dc jack plugged in. I tested contact points on both sides of the motherboard on the soldering points. Each time getting the 8V reading.
Thanks for the help
More about : laptop power adapter charge battery
pepi93
January 3, 2014 9:23:35 AM
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pepi93
January 3, 2014 10:07:57 AM
well the adapter is fine because I checked it on another laptop...
sorry, I don't know what that actually means "short circuit" on the motherboard....
do I need a new motherboard?
the thing is...I was also only getting 8v on each red wire when I had just the dc jack connected to the ac adapter alone...
sorry, I don't know what that actually means "short circuit" on the motherboard....
do I need a new motherboard?
the thing is...I was also only getting 8v on each red wire when I had just the dc jack connected to the ac adapter alone...
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pepi93
January 3, 2014 10:31:02 AM
pepi93
January 3, 2014 10:41:09 AM
pepi93
January 3, 2014 11:12:09 AM
pepi93
January 3, 2014 11:33:31 AM
pepi93
January 3, 2014 12:07:37 PM
pepi93
January 3, 2014 12:21:32 PM
pepi93
January 3, 2014 12:57:34 PM
pepi93
January 3, 2014 1:41:26 PM
pepi93
January 3, 2014 2:43:22 PM
This board is likely shot and when a high priority chip like this fails it usually takes others with it unless there is a bad joint you are not likely to get this running. So you are left with one other option and that is to hunt down another board. I rebuild and customize laptops so I learned what to fix and what to flat out avoid. When a board goes out it is usually not worth the money fixing or replacing but bad chips can be difficult to root out.
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pepi93
January 3, 2014 3:57:51 PM
pepi93
January 3, 2014 5:09:12 PM
pepi93
January 3, 2014 6:23:44 PM
pepi93
January 3, 2014 7:36:09 PM
pepi93
January 4, 2014 3:33:45 PM
pepi93
January 4, 2014 8:07:51 PM
I can do it, but you if you never solder before I don't think so. You need to have the skill in soldering to do a good job. You must have a soldering iron and a hot air soldering iron to remove the chip. The most difficult component is the chip (MAX17435ETG) if it's the problem. And you need to find the component also.
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pepi93
January 5, 2014 11:34:49 AM
The voltages you gave me are not conclusive to determine for sure that U6000 is defective. To be sure, give me the voltages for the :
D6004 diode = ?
D6005 diode = ?
R6012 resistor on both side = ? and = ?
C6023 capacitor = ?
C6032 capacitor on both side = ? and = ?
all those voltages referring to ground or black wire.
D6004 diode = ?
D6005 diode = ?
R6012 resistor on both side = ? and = ?
C6023 capacitor = ?
C6032 capacitor on both side = ? and = ?
all those voltages referring to ground or black wire.
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pepi93
January 5, 2014 1:39:20 PM
pepi93
January 13, 2014 7:11:36 AM
pepi93
January 13, 2014 9:12:48 AM
Just tested the c6028....its as you say, 1.68v on one side and 0 on the other side.
You think maybe there was a surge in the circuitry and by removing all the parts and doing this testing I may have fixed this? You remember in our initial testing I said I got some sparks? This is no longer happening, I've touched those same components again near the U6000 and there are no more sparks.
You think maybe there was a surge in the circuitry and by removing all the parts and doing this testing I may have fixed this? You remember in our initial testing I said I got some sparks? This is no longer happening, I've touched those same components again near the U6000 and there are no more sparks.
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pepi93
January 13, 2014 10:58:37 AM
pepi93
January 13, 2014 12:28:27 PM
pepi93
January 13, 2014 4:10:14 PM
Best solution
You have the pin 3 named DCIN, this pin is the Charger Supply Input, on this input you read 19v, the voltage from the adapter. After you have pin 19 named ACIN, it's the AC Adapter-Detect input with 1.5V, it's compared to a fixed voltage of 1.485V (typ). The two readings are good, but the comparator inside the chip gives a low signal to the ACOK who is the AC Detect Output. The pin 10 is the ACOK, it should be low when the AC adapter is present and enables the charger. But you have 3.8V on pin 10, also you have the pin 14 named PDSL, who at the presence of the adapter should give 8V above the voltage of the adapter, but you have 0V. You have some voltages from this chip who are not good to use the adapter for the main source of power.
Sorry if it's too technical.
Sorry if it's too technical.
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pepi93
January 13, 2014 5:08:57 PM
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