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Hi I have a Sony VGP-BPS9/B laptop. It was working fine until I noticed that the battery wasnt charging. I heard the ac adaptor buzzing a bit so I figured the ac adaptor was on its last leg. So I ordered a new one. That didnt charge the battery. So I ordered a new battery. Still nothing charging.
I shut the laptop down, removed the Sony VGP-BPS9/B battery(new and old) and tried running the laptop just off the old ac adaptor.
It boots up fine and is usable but I cannot get the battery to charge whether its the new /ac adaptor or the old ones.
Is there anything that possibly went on the board itself?????
I have been doing some research but cant find much answers out. I read some other people having the same problem but nothing answered in several forums I have read.
Bonjour à tous,

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reported that replacing both the adapter and the battery did not restore charging, while the laptop will run from the adapter with the battery removed. noted a motherboard replacement fixed a similar symptom. Before accepting a full board swap, run a few focused checks to localize the fault — most of these faults are either the charging path on the motherboard (jack, fuse, MOSFET/PMIC) or the battery’s own charge-management electronics.

  1. Use a multimeter to check the adapter plug (DC volts) and compare to the value printed on the adapter label. Do the same at the laptop DC jack if possible. If the adapter reads correctly at its plug but the voltage is missing at the battery connector on the board, the problem is internal (jack, fuse, charging circuit).
  2. With the battery removed, boot on AC and watch the charge LED/BIOS battery status. In Windows check Device Manager -> Batteries and run powercfg /batteryreport to see whether the OS detects the pack or shows charging errors.
  3. Measure the battery pack voltage at its terminals (with the pack disconnected). A healthy pack will show a nominal voltage; a dead/shorted pack may read very low or zero. If the pack has voltage but the laptop won’t charge it, the pack’s communication/BMS or the motherboard’s charger is likely at fault.
  4. Inspect the DC jack and battery contacts for looseness, burn marks or corrosion. A buzzing adapter often means the adapter is under abnormal load (short or excessive draw) — that points toward a charging-circuit fault rather than a simple adapter failure.

If your measurements show adapter voltage present at the DC jack but no charging at the battery connector, a board repair (replace jack, SMD fuse, or charging IC) is the likely fix. If the adapter or battery fails the meter tests, pursue RMA/replacement. If you’re uncomfortable probing inside, collect the above meter readings (adapter open-circuit volts, battery terminal volts, BIOS/OS battery status) and hand them to a technician — those three numbers usually tell whether the mainboard really needs replacement. Back up important data before any repair.

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Member Avatar for Webville312

It could be a problem with the motherboard. I had a similar problem, and when I contacted the technician, he replaced the motherboard, and now it runs fine ...

Member Avatar for Webville312

My advice is that you have a qualified technician check it out, and they'll be able to tell you what is wrong with it ...

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