Hello, i fixed Dell Vostro 2521 beeping by flashing ONLY this file (inspiron 3521_bios_work.bin) from Inspiron 3521, see attachment. Only 4MB chip needs to be flashed, if i flashed both, the machine lit up without beeping but no video and no boot. I restored both chips to original and flashed only 4MB chip, laptop working.
Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
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