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This high capacity rechargeable Acre Travel Mate 240 replacement battery definitely disposes of more power than the battery which was included in the delivery of your device.This laptop battery for Travel Mate 240 is 100% compatible and will meet or exceeds original specification.Made with premium quality cells,the Ac er laptop battery for Travel Mate 240 has been tested for safety and designed for high performance
Windows 7 should install on the Travelmate without any problems. However, you are correct to assume that some of the drivers will either not be available or out of date. You can find the ACER drivers on the Acer support page.
For that you need to uninstall old audio driver from control panel->add remove programs then install driver from below link. click here Download driver for your os and install audio driver. Let me know if you need further assistance. Thanks for using FixYa.
make sure processor fan is working fine. you may hear the sound of fan on the left side of the laptop. and make sure its not getting heat soon. If the fan is not working you need to replace the fan. If if gets heat soon that means you have to put processor cooling paste.IF the fan is working fine and the processor heat is normal, then you need to re-fix the RAM. Then it will work fine..ok
You need to find right drivers for your laptop .
search on google as " windows drivers for acer travel mate 5520 " if you do not know how to install drivers let me know .
scan you system with an anit virus as well