I have tried to upgrade the vidio card to a Galaxy GEforce GT610. The computer would not send a signal to the monitor with this card plugged in. I think I heard the computer beep 4 times when booting. Can anyone give me advice on this. Could it be that the Power Supply would not handle the card. The instructions with the card say a 300 watt PS is mininyn reqyured, I have a 400 w supply available but don't want to change it out for fear of voiding my HP warranty.
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