Help, please! Pavilion 754n no display will not even show BIOS

First, it has a 80gig HARD drive, everything worked fine initially, then I changed hard drives and put it in a concert 20, have all two XP on it, I wanted to see who was on the 20, after I plugged it in and pressed the power button there is no response, nothing on the screen. The power button is green, then he went to orange, the fans kicked on and other that that there was no noise, stay like that forever. So I thought (OK something wrong with the hard drive), which is weird, because I know that the HARD drive works (and I have tried since and it does not start on another PC). So I put the original, when I hit the power button is the same thing, it's been like that since, I tried two other HARD drives.

Is troubleshooting I've done so far, reset the CMOS on the map, unplugged everything on the Board and reconnected it looking for the loose cords and the like, tried different riders on the original drive eventually return to that I started on what he did start from the beginning, tried to take all of the ram on resettlement try each stick in each slot try diff ram total, trying to start between each step, tried another CPU that I know works, I tried to start the original disc 80gig HARD on a Dell bios page, it says (error reading disc press F1 to re - start) I press F1, 5 - 10 times it will not start, something happened to this drive while it was initially on the dell HDD then I put the 20gig in the dell and it starts fine. If I put this concert 20 HP I get the same result as above, so I know it's not a hard drive issue, obviously because even with no DISK in the HP, I should get at least to the page of the bios that I can't.

So I narrowed down it to the mobo, and my question is has anyone at - he heard a simple commutation of the HARD drives causing a mobo don't not working? Also any ideas on why the disk HARD original stopped working after spending the 20gig and then back? Can anyone think of stuff or procedures to try that I have not already?  Thanks for any help!

Yes spend hard disk could negatively affect the motherboard if connected to ground or precautions rules were observed. Have you been paying attention to connect you to the case? Any discharge of static electricity on your part to the Board of directors could have killed the jury. I can only suggest you remove the MB and place it on a surface antistatic is to say cardboard and connect only the 20/24 pin and 12v atx power connectors. If the jury does not appear now so it is safe to assume its dead. If it should power up you know now it is shorting out on the connections or the case. Good luck.

Tags: HP Desktops

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