Acer 4520 laptop missing dvdrw in bios

i have acer aspire 4520 laptop, now the laptop bios did not show any dvd-rw. but when i am not used that laptop two -three days then i show dvdrw detect automaticlly. but then use dvdrw with in one hour system was hung after restarting bios not detect dvdwr agian !!!!
i have open dvdrw from laptop and then put into dvdrw slot then same problem !!!!
!!!! pls help me
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More about acer 4520 laptop missing dvdrw bios
  1. Loose connection maybe? You can try to flash the BIOS to a new version, but it sounds like your drive connector is bad.
  2. problem in south bridgechip .due to over heat of laptop this chip dama
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