Won't recharge when charge plugs in. Charger and battery are good. Charges very intermittently. Checked motherboard for cracks and bad solder joints. Changed jack. Still won't work. Charger is fine, battery is fine. Just won't charge.
Can I power the thing with voltage to both sides of the mother board?
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This is a common problem. It may be that the charger is dammaged. these Dell chargers have a micro thin communication cable in them that tell the charger to charge the battery. this micro thin cable can often break. Its use it to prevent the laptop battery from over charging, but if it breaks or becomed broken inside tha charger cable, then the laptop simply won't get the charge signal and the battery won't charge. If this is the case, then you will need to replace the charger with another Dell charger compatible with your laptop
The charging circuits in the motherboard are not functioning or the new rechargeable battery is bad, this can be checked with a digital meter to determine if the proper voltage is present at the laptop terminals.
Ifthe laptop battery is more than 3 - 4 years old then the battery could be wornout. Rechargeable batteries have a finite number of charge and discharge cyclesand will lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up atall.
ORThe battery shows a 100% charge but when the adapter is disconnected the batterydrops off to zero capacity in a very short time.
Ifthe battery drops to an unacceptable charge level then the battery needs to bereplaced.
Try the battery from the other Dell system. If it charges fine, then its a problem with the battery, go for a replacement. Else, try updating the BIOS once from http://ftp.us.dell.com/bios/1525_A17.EXE. If it still doesn't charge the battery, then you may have to go for a motherboard replacement. If the system is under warranty then call Dell Tech Support @ 1-800-624-9896.
The charging circuit requires an ac adapter with an intact sensing pin in the center of the Adapter barrel plug that connects to the computer. If the pin is bent or broken, the charger is disabled.
If possible, try a known good adapter from another D or E Series Dell Portable. If a KG adapter charges the battery, replace the adapter. If it makes no difference, then replace the motherboard
It is normal for a battery to degrade after a year since its a consumable part. It's just like any ordinary rechargeable battery. We have 2 points of failure that might be causing the problem. First the battery itself. Second the Charge board that charges and detects the battery. Given that the NON-DELL battery is working on other dell Computer, it simply tells us that it is the charge board that needs to be replaced wich is integrated to the motherboard. If your warranty is still active, call dell and tell them that you've tried a Known good battery and its still not charging. However, you might also consider that dell computers are designed for dell batteries. the charge board might have problems charging the third party battery since its not configured to do so.