Question about Sony VAIO FRV28 Notebook

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My PC won't run with ac /dc power!

My sony vaio pc will not work with the ac/dc power supply plugged in if the battery is in the pc. When the power supply is pluged in my cd rom won't work and the pc sometimes shuts down. with out the power cord the pc is fine but the battery doesn't last long. I have noticed sometimes when I plug the powere supply in, the power supply light goes out and the pc is now running off the battery. I also notice the little icon on the bottom does not change from ac/dc back to the battery icon. My pc won't work with the power supply plugged in, but it will charge the battery if the pc is off. If you take out the battery and just used the power adapter the pc is fine, but the cd rom does not work properly. Last but not least, the pc light used to turn red indicating a full battery now it does nothing

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Re: My PC won't run with ac /dc power!

Hello. There is a hardware failure with the laptop not the AC charger. AC chargers have some range of protections of their own. If the power requirements of the laptop are bigger then what the charger can handle, the charger will turn off. Also other parameters can bring the charger offline. In your case, you have a problem with a small chip, the battery charge controller unit, witch regulates the amount of current required to propperly charge the battery. When this thing fails, the charging requirements for the battery are reported rong and the AC charger is forced to give more power then necesary. This results in disconnection of the AC charger ( an internal fail safe of the AC charger) and the laptop to swich back to battery power. When the laptop is turned off, it can charge the battery because the power requirements are low, having all processor, main board, hard disk etc turned off. Therefore the AC charger can handle the load. However you will need to have it checked by a service center as it is a hardware fault. Both AC charger and laptop needs that check. The charge controll circuit needs to be replaced probably. It will be a somewhat expensive repair. Don't buy any other battery untill you have the laptop checked. For more aditional info please post back. PS. Sorry for my bad english, I am from Romania, it is pretty hard for me to explain tehnical stuff in english.

Posted on Feb 16, 2007

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