RCA RLED4778A No Backlight no Pic No Response

[Mayn]

Re: RCA RLED4778A No Backlight no Pic No Response

Same tv, same symptoms. 400deg for 10 mins in the oven for the main board and it works again

[fixer-68]

Re: RCA RLED4778A No Backlight no Pic No Response

Same tv, same symptoms. 350deg for 10 mins in the oven for the main board and it works again. How strange is that, does anyone have an explanation for why this works, and how long has this fix lasted? Also is this the only set that this method has worked on?

[nomoresonys]

Re: RCA RLED4778A No Backlight no Pic No Response

Bga on the mainboard overheats, try rigging up a fan solution to keep it cool, it may last a long time, without the extra cooling of a fan it might only last a day a week or a few months more than likely. I've seen where a second heating after tv quits working again may work but many times the second heating does not work.

[KevinK]

Re: RCA RLED4778A No Backlight no Pic No Response

I expect it re-flows the solder. The TV I fixed was my brother's, and he gave it to his girlfriend. I've asked him about it at times and as far as I know it's still working, after 5 years.

[nomoresonys]

Re: RCA RLED4778A No Backlight no Pic No Response

I expect it re-flows the solder. The TV I fixed was my brother's, and he gave it to his girlfriend. I've asked him about it at times and as far as I know it's still working, after 5 years.

Good to hear, most don't fair nearly as well.

[diif]

Re: RCA RLED4778A No Backlight no Pic No Response

There's no reason to think if the BGA has only failed after 10 years then it should last another 10, if the reflow is done well. If it's not cost effective to reball then I reflow and I haven't had one back yet.