Fixing a NES Console?

[Shredder]

This may not be the expertize of this forum, but I figure it's worth a try.  

Does anyone here know how to start fixing the NES PCB?  I had the blinking light syndrome on mine, and replaced the bendable 72 pin connector on it.  The Game/system then worked, but the damn thing had white lines all over the screen and was  highly annoying when played.

So, in one of my not so  bright moments, I thought that by placing a metal screwdriver with a rubber tip over the bottom of the PCB, and running it lightly over the board, I might be able to kick it back into working order.  However, as I did this, the screen suddenly turned blue.  

I turned it off, turned it on again, and it hasn't worked since.  Everything on the board is in tact.  Nothing fell off it, it just isn't working anymore.  The power light turns on, but no picture...

Any ideas?
Thanks

[Silentthunder]

Could have been you bought a bad 72-pin connector?  I had the same blinking light syndrome, but then I replaced the 72-pin connector and it worked fine....better than before actually.

My friend bought one to replace his 72 pin connector, but it had the same problems your's has.  The white lines.  He sent it back and got another new one.  I installed it for him and it works perfect.  

Thats where I would start.  

Are there any burn marks on the board?  You might have shorted something when you ran the screwdriver over the board.  If you could, take a high rez close up picture of the front and the back of the board...maybe we can see something on it that you missed?

Just some suggestions.