The main processor on this HDTV's main board gets quite hot. It has a heatsink but it is small and tends to come off, though mine is still glued on very tightly. Still my TV just started giving me poor a picture (vertical lines, bad color, etc.). Like several other owners of this unit have reported, if you reattach a lose or fallen off heatsink you can get the picture back, though results vary. Because my heaksink is intact, I decided to put a large computer case fan next to my processor and, as predicted, the picture came back to normal. Problem is that picture still goes out sometimes even though I have brightness/contrast at very low settings (if I turn brightness up high then picture craps out). So then I have to turn it off for a few minutes and it is good for awhile again - not a very good fix!
I would like to re-flow the chip for a better repair but noticed that there are lots of surface mounted components quite close to the main chip, not to mention many more directly under the chip. I know this will complicate matters. Will it still be possibly to re-flow the chip, especially regarding the components directly under the chip - won't the small resistors,etc. on the bottom side just fall off when a heat gun is applied from above?
Other info: HDTV is about 10 years old but still makes a good basement TV. Not sure if this caused problem, but the bad picture occurred shortly after I tried to output a 1080i picture on this 760P TV. Others have reported getting this HDTV to output 1080 on the component connectors for viewing text on a computer. For me it did output, but picture was a little "jumpy". Possibly just trying higher resolution partially "melted" a connection on the chip, and bad picture showed up a few days latter when chip got hot enough in melted area(s) causing a bridge/short.
Woody
I would like to re-flow the chip for a better repair but noticed that there are lots of surface mounted components quite close to the main chip, not to mention many more directly under the chip. I know this will complicate matters. Will it still be possibly to re-flow the chip, especially regarding the components directly under the chip - won't the small resistors,etc. on the bottom side just fall off when a heat gun is applied from above?
Other info: HDTV is about 10 years old but still makes a good basement TV. Not sure if this caused problem, but the bad picture occurred shortly after I tried to output a 1080i picture on this 760P TV. Others have reported getting this HDTV to output 1080 on the component connectors for viewing text on a computer. For me it did output, but picture was a little "jumpy". Possibly just trying higher resolution partially "melted" a connection on the chip, and bad picture showed up a few days latter when chip got hot enough in melted area(s) causing a bridge/short.
Woody
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