Components that fail causing YLOD other than odvious

Ok, we all know the YLOD is usually the rsx loosing some contact between the chip and the MB, but lets look at some other possibilitys, Does anyone have suggestions of some parts that have been known to fail in conjunction with the ylod. Even some things you have found out trying to repair ylod. Such as this...I have pulled the rsx chip off, and cleaned the pads, they looked perfect, no bridging, so I thought wonder what would happen if I power the board with no rsx....when I pressed the power button smoke from a black chip. What the !!!! Why did this happen? Does anyone know what this chip is the info is NEC/TOKIN 0E128 8G28802351 could these possibly go out if the chip desolders in a certin place making reflow or reball fail? How can I test this chip?

Here is some info I found on this chip...It is a noise filter basicly, filter the cpu and possibly the gpu, which explains the coorilation between the removal of the rsx and the smoke from this component.

http://www.nec-tokin.com/english/pro...izer_pam_e.pdf