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I don’t have a reboot bios feature to reboot to my default

I’m not precisely sure what your saying, but I think your BIOS settings may be messed up. To fix this, use the guide below to remove the CMOS battery (step 5) and place it back. Hope this helps! Repairing Gateway 420GR

Supplying any information you receive on the screen, even as to where it is failing, can help identify the error. The beep is just a signal to the user that “Something” Is wrong. Possible reasons without further information include, but are not limited to: Bios Failure Software Failure Hard Drive Corruption RAM Corruption Insufficiant Power, (PSU FAIL) Motherboard failure Processor Failure