black screen - no video/no sound

[FastBroker]

I have a new xbox360 jtagged whit nand-x tool and new freeboot 12611 but....
After replacing the heatsink on the GPU with a more powerful thermalright hr-03 I turn on the console but the screen stays black.
I noticed that the heatsink does a lot of pressure on two capacitors, so I thought it was the problem, can be?
Please help me!

 

[J2G]

how much thermal compound did you apply only need a thin coat and did you put back on the clamps or use bolts.

 

[FastBroker]

I applied the arctic mx3 and set the heatsink with the screws and bracket of thermalright hr-03. yes i have apply only need a thin coat.
Can you tell me if this problem can be caused by capacitors? I have 2 capacitors very tense

 

[J2G]

Heemmm it could be the heat sink should not be putting pressure on capacitors how are you managing that one cant see how you should be doing that it could also be a cold solder joint on the GPU.
What error code are you getting as in secondary Error code ?

 

[Skinleech]

Also check the make sure you didn't scratch the underside of the motherboard when you took the Xclamps off. I did this on my freshly jtagged console and got the black screen, though Xell would boot. Thankfully it was in a non-essential area.

All I did was loosen the bolt a little then apply some clear nail varnish to the scratched surface, and when I put the console back together all was good.

 

[J2G]

FastBroker whats the secondary Error code ?

 

[FastBroker]

Heemmm it could be the heat sink should not be putting pressure on capacitors how are you managing that one cant see how you should be doing that it could also be a cold solder joint on the GPU.
What error code are you getting as in secondary Error code ?

My console is new... before of change heatsink was good.

when i start it, i get 1 green light whit DVD player connect and 1 green light flashing when don't

Also check the make sure you didn't scratch the underside of the motherboard when you took the Xclamps off. I did this on my freshly jtagged console and got the black screen, though Xell would boot. Thankfully it was in a non-essential area.

All I did was loosen the bolt a little then apply some clear nail varnish to the scratched surface, and when I put the console back together all was good.

There aren't graphs on the back, i have been very careful.

 

[J2G]

Look here on how to get secondary error code FastBroker >>> Secondary error code so you can get some idea if its a GPU problem.

 

[FastBroker]

Look here on how to get secondary error code FastBroker >>> Secondary error code so you can get some idea if its a GPU problem.

Jhohnny i I do not have the red light. I have only 1 led green

 

[modmonster]

Its a long shot, but turn the unit off, press and hold the sync button and turn the xbox on whilst still holding the sync button, until it boots (if it does)

 

[J2G]

lol ok my bad just read that bro try removing the heat sink and have a look for damage if you changed it try the old one again not seen this before with a green light normally red.
How do you mean it new if its a Jtag was the console new in the box just never opened before it got Jtagged just seems abit rare lol.

 

[rocket8080]

Ive had this before when changing a heatsink for my brothers friend, turned out to be a cold solder joint under the gpu. My thoughts were that the board might of flexed a little when removing the board from the chassis and when removing the gpu heatsink. Reflow worked for me.

If the capacitors are shorting out against the heatsink then you should get either 1 or 3 red lights.

 

[J2G]

i said the same thing cold solder joint under the GPU but when he said not red light sounds abit odd..

 

[rocket8080]

yeah the no red light threw me aswell when it happened to my brothers mates.

 

[FastBroker]

Its a long shot, but turn the unit off, press and hold the sync button and turn the xbox on whilst still holding the sync button, until it boots (if it does)

Nothing .
I have also try to put original heatsink and change thermal compound but nothing

 

[manwithoutname]

First things first, try writing the original NAND and see if the console boots the old dash!

 

[modmonster]

Nothing .
I have also try to put original heatsink and change thermal compound but nothing

Ah well it was worth a shot. Had one the same last week and that fixed it. Anyway try this and see ^^^^. If its jtag related, these clever chaps will sort you out.

 

[FastBroker]

First things first, try writing the original NAND and see if the console boots the old dash!

i have jtagged console whit jtag tool v2.50 whit only 1 "badblock 250 bd".
This tool automatic remap badblock? indeed it has launch the new dash and i have configured new setting. So i thought everything was good and after configured new setting i have turn off console.
Then i have simply change heatsink and this damned change have stopped my output video/sound

ps: i have jtagged console whit alternative point for easy insert heatsink on the motherboard

 

[rocket8080]

First things first, try writing the original NAND and see if the console boots the old dash!

I think he said it was fine before the heatsink change

My console is new... before of change heatsink was good.

EDIT beat me too it Fastbroker lol

 

[J2G]

It was fine up to where he did the Heat Sink swap over so if you do what manwithoutname says writing the original NAND back and if it boots the old dash it would rule out a cold solder joint on the GPU !