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Sony VGN-FS840 Power Adapter
When purchasing a replacement AC charger, choosing the Sony brand one is always going to be the safest and easiest way to go. The Sony VGN-FS840 power adapter is responsible for two things, to charge up the main battery while simultaneously providing power for the laptop. A universal AC adapter can be used if yours is unavailable or backordered. If you decide to buy an non-Sony adapter, it is imperative to note the output of amps and voltage. Because Sony has been known to use a single AC adapter that can be used on other units, make sure you check the part number for the correct one.
What are the clues to watch out for to know my Sony AC adapter is almost dead?
- Your Sony battery refuses to charge at all
- Most Sony adapters can get quite warm when plugged in for any length of time
- The laptop does not work while solely using the AC adapter
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