I have an hpe pavillion 1214 and I took out the old card and psu and replaced it. The old card and new 650w corsair tx650 psu worked but the new card and new psu does not. It runs and there is no beeping, I don't think this computer has an onboard graphics card. I turn it on and the fan on the sapphire radeon hd 7770 runs but I get no signal. I plugged it into the power supply and my old card works if I switch it back. I have no clue how to fix it but the new card gives me a no signal when I turn the computer on. The old card is an amd radeon hd 7450 and the new one is a sapphire amd radeon hd 7770. The psu is a corsair tx650.