[Thinkpad] T4x series' problem with ATI video

[PLDT FOA- Rodrigo Amoranto]

These defects affect how many percent of T4x?
 
 
==========================
 
That's true.
 
The symtom of hang, freeze, power on but there is nothing on lcd and fan runs ... is the issue of the BGA Video chip on T4x models. This accounts for about 80% of the defect on T4x
The other 20% is on the voltage regulator chips/circuit(can not power on, fan does not run)

Most of these issues can be repaired at component level. However, it's relatively expensive.

PLDT FOA- Rodrigo Amoranto <sojourn at pldtdsl.net> wrote:

	Hi,
	
	Thanks for all those that answered my earlier posts, was a big help.
	
	However, while I was googling for some answers, I came upon posts and articles describing how their T4x series starts to hang, freeze, BSOD etc. They attribute this to the ATI GPU coming loose on the board. That this happens over time and because of motherboard flex. Reading the posts gave me the impression that a lot of T4x users are afflicted by this.
	
	How prevalent is this really? Inputs from Bruce and from others that sell new and used T4x units and from owners of T4x series are welcome. Also from those that repair such units.
	
	Thanks
	
	Erwin
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