Originally Posted by PitVipers
I have a KDS-60A2020 and (knock on wood) haven't had any of the dreaded OB problems. After about 9000 hours, my original bulb died. I got a replacement Phillips bulb (XL5200) and everything was fine for 3 weeks. About a week ago, my TV wouldn't turn on -- I'd get the flashing green light, followed by the flashing red bulb light and 2 light buzzing noises coming from the lamp area.
I pulled the bulb out, looked fine, and put it back it in. I turned the power back on and the TV worked fine with a great picture. Every time I turn off the TV, though, the next time I go to turn it on, I get the same green light, red light, buzzing noises. I can get the TV to work by pulling the bulb out and putting it back in (sometimes it takes 2 or 3 tries).
I sent away my old bulb for disposal, so I can't check the old one to see if I have the same issue. I don't mind getting another bulb if that would fix the problem, but I'm looking for opinions on whether this is a bulb issue or some kind of power issue. Any thoughts?
I have the same problem as mentioned in the quote above. I noticed where it was thought to be a bad ballast, but i read the rest of the thread and never saw a confirmed fix for the issue. I have been searching for days and have not found an answer yet. Actually, this is the only place where i have seen information on someone having the same issue.Here is the exact rundown of what i am experiencing - KDS-60A2020.
Bought the TV locally, issue was thought to be a bad bulb because the lamp light was flashing red, I observed this before I bought the TV. Also, the origional owner informed me that when the optical block issues came about, a service tech came out and replaced his under warrenty a few years ago. He told told me the TV did not have any OB issues but since his serial number fell within the recall, they replaced it.
Brought it home and plugged it in and this is what I get:
TV turns on, I hear relays click, I can hear the fans kick on and begin to run. The power light begins to flash green (sometimes it will flash only a few times, sometimes it will flash 20+ times, it is not consistant). You can then hear the ballast buzz, it will do this twice - bzzzzzzt........bzzzzzzzzzzzzzzzzt. As soon as it stops buzzing the second time, the lamp light begins to flash red, which is a constant flash (it just flashes constantly and does not pause nor stop). The power relay does not shut off and the rear fan will continue to run. Every time you hit the power button to turn the TV on, the same green light will flash, the ballast will buzz, and the lamp light will come on. After the TV sits idle for a few minutes you can hear the power relay click off. If you hit the power button again, it will repeat the same process.Here is what i have tried thus far:
- Removed and replaced the bulb with a brand new one.
- Pulled all boards and cleaned the inside of the TV peice by peice.
- Cleaned all fans and housings.
- Reseated all connections and checked all wiring
- Observed all fans running (have not watched OB hampster wheel fan run but did turn freely by hand and with canned air when I had it out)
- Tested lamp door switch and held in to ensure functionality
- Observed lamp with lamp door off and switch held down - When the ballast buzzes both times the lamp lights up. Tested this with the old lamp and received the same result. Old lamp seems to function fine. However, if observing the screen when the lamp fires, you can only see the screen light up slightly in a pitch black room, just a slight glow so to speak. This is true with both the old and new bulbs.
- Removed the ballast and resoldered/touched up all solder joints and tested all transistors with DMM to ensure none had failed
- Recrimped ballast lead ends where bulb plugs into ballast wiring connector to ensure good contact with bulb connector
- Measured voltage feeding ballast board, voltage present
- Measured voltage from ballast to lamp, blew multimeter up
None of these steps has changed the problem at all. I'm not sure where to go from here, and I dont really want to just start ordering parts without knowing for sure what the issue is. Do you think it could be a weak or failing ballast, or something else?
I will also be contacting Sony to see if the support center can offer any guidance on this.
Any information is much appriciated.Edited by gotusick - 9/9/13 at 7:20am