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I have an 845 chipset mb.I am a microcontroller developer,use parallel & serial ports.Yday i put a reverse polarity +5v on the parallel port(pin18) other pins were buffered.But since then,monitor wont start.No beep.Fan runs and 5v is present on mb.I removed RAM and checked.Tried with all external devices removed and checked.But no,it wont turn on. Is the video chip(realtek) fried?Do i need to replace mb?Please help!
 
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