PS3 Fat YLOD after reassembly

[Snake_Plissken92]

Hi guys, so i bought used fat model CECHL04 and the thing was loud, so i decided to open it up and replace thermal paste. Upon disassembly where you need to pull out the motherboard i had problem because it looked like mobo was glued to heatsink. I tried (carefully as i could) to disconnect the mobo with tools and the damn thing finally gave up. To my surprise the previous owner placed thermal pads on cpu and gpu chips. Anyway i used my thermal paste mx-2 ( not too much) but enough and spread it over cpu and gpu to cover whole surface. After assembly i tried to run the console but after pressing power button the fan spin up the LED went from green to yellow and red, in 1.6 seconds i think, it was fast. So i knew i screwed up with something. What components on mobo can i test to find the cause of this ylod? Or if you guys have any advice i would be grateful. Any help is appreciated. Thanks in advance.

 

[nCadeRegal]

Could be anything but more than likely you screwed up the bga on either cpu or rsx. You could try the penny trick to see if extra pressure on the chips brings her back. After that a reflow or reball of the chips would suffice. That's only if you didn't lift any pads though which is most likely what happened.

 

[Snake_Plissken92]

Could be anything but more than likely you screwed up the bga on either cpu or rsx. You could try the penny trick to see if extra pressure on the chips brings her back. After that a reflow or reball of the chips would suffice. That's only if you didn't lift any pads though which is most likely what happened.

Thank you for reply. I feared that might've happened. I was going to try the penny trick but thought the force wasn't strong enough to rip bga. Will try it tough, thank you.

 

[xanadu247]

Thank you for reply. I feared that might've happened. I was going to try the penny trick but thought the force wasn't strong enough to rip bga. Will try it tough, thank you.

Never do the penny trick! It can create uneven pressure and doing so will warp the motherboard more, possibly to the point where even a reball won't work.

Bend the clamps a little and you can try to restore the lost bga contact. Failing that, you need to bring it to a professional to reball it, if you want a long-term fix.

Sent from my CLT-L04 using Tapatalk

 

[haxxxen]

Bend the clamps a little and you can try to restore the lost bga contact

for my CECHL, I am using some spacer underneath the clamps, which is almost in height of the holders and it is working great. additionally, it improves temps. I am using some small test pcb's for the spacer, so it is very solid, but still flexible to some point

I am no fan of this rubber trick, which goes directly on those cpu caps

 

[vyktormvmpay25]

Hi guys, so i bought used fat model CECHL04 and the thing was loud, so i decided to open it up and replace thermal paste. Upon disassembly where you need to pull out the motherboard i had problem because it looked like mobo was glued to heatsink. I tried (carefully as i could) to disconnect the mobo with tools and the damn thing finally gave up. To my surprise the previous owner placed thermal pads on cpu and gpu chips. Anyway i used my thermal paste mx-2 ( not too much) but enough and spread it over cpu and gpu to cover whole surface. After assembly i tried to run the console but after pressing power button the fan spin up the LED went from green to yellow and red, in 1.6 seconds i think, it was fast. So i knew i screwed up with something. What components on mobo can i test to find the cause of this ylod? Or if you guys have any advice i would be grateful. Any help is appreciated. Thanks in advance.

Use uart adaptor to usb and read errors. If you seen images on screen before opening unit, work around delid both if you can handle.
Best and first use that uart adaptor to read errors from syscon. Later take decisions.

 

[Snake_Plissken92]

Thank you all for your replies. I will try recommended methods. I'm just sad because i have finally fixed the bluray drive that was causing problems, jailbroke the console, and then this ylod happened. Damn, how could thermal pads be so glued to the board?

 

[xanadu247]

They aren't "glued". It's just the size of the GPU and CPU that create a lot of surface tension.

For future, never pry the motherboard off the heat sinks forcibly. Just lift slightly and hold the corners on the opposite side of HDMI connection for 30-40 seconds and it will loosen itself.

Sent from my CLT-L04 using Tapatalk

 

[Snake_Plissken92]

They aren't "glued". It's just the size of the GPU and CPU that create a lot of surface tension.

For future, never pry the motherboard off the heat sinks forcibly. Just lift slightly and hold the corners on the opposite side of HDMI connection for 30-40 seconds and it will loosen itself.

Sent from my CLT-L04 using Tapatalk

I am always careful when opening the board, because i know those chips are sensitive, and i don't want to break anything. I have disassembled 15 consoles so far ( fat and slim) and board always gives a bit of resistance, but not this much. I was surprised to find thermal pads there. And as careful as i was again i couldn't remove those pads easily. But lesson learned, expect the unexpected. XD