Entertainment Center: TVs, Stereos, VCRs and DVDs - Sony KVA2942U picture cuts out w/flashing LED
Doityourself.com community forum was created to provide answers to all questions related to home improvement and home repair. Doityourself community can help you find information about how-to topics on small fixes to large remodeling projects. With comprehensive how-to content and expertly moderated community forums DoItYourself.com makes it easy to tackle even the most complex home improvement projects.View Full Version : Sony KVA2942U picture cuts out w/flashing LED
andy99
02-17-02, 04:21 AM
I have a problem with my Sony KV-A2942U TV that appears similar to that of Matt Barney, in that for several weeks the screen would suddenly go dead (standby mode) and the LEDs on the front would flash.
The problem seemed to fix itself if i wiggled the scart cables at the back and pressed a channel button on the remote. But this morning when the TV put itself into standby again i heard a click (like a relay). Now i cannot get any picture at all, no matter how vigrously i wiggle the scarts.
When i use the remote to get out of standby, i can hear the high voltage static noise, then the click, then the flashing LEDs.
I have looked at the http://www.videotech.org/self.htm site, but as i cant get any picture on the screen the diagnostics aren't much help.
Is this the next stage of the same problem Matt has, or something different and how easy to fix is it??
Please help!!:confused:
The problem seemed to fix itself if i wiggled the scart cables at the back and pressed a channel button on the remote. But this morning when the TV put itself into standby again i heard a click (like a relay). Now i cannot get any picture at all, no matter how vigrously i wiggle the scarts.
When i use the remote to get out of standby, i can hear the high voltage static noise, then the click, then the flashing LEDs.
I have looked at the http://www.videotech.org/self.htm site, but as i cant get any picture on the screen the diagnostics aren't much help.
Is this the next stage of the same problem Matt has, or something different and how easy to fix is it??
Please help!!:confused:
Smokey
02-17-02, 01:02 PM
Good Afternoon, andy99:
We don't mind hearing about the competition on this site. But, we think we do a better job than most.
The problem is located in your High Voltage Supply and deals with the regulator circuit. The high voltage on the picture tube is regulated heavily to prevent X-Ray problems and fires. If the voltage on the picture tube exceeds specified limits, the cut off circuit engages. Hence, you have the flashing LED.
Conversely, the same thing occurs if the High Voltage Supply gets too low. For this, you can assume that the Low Voltage Power Supply is not running up to specifications.
Be thankful your machine shut down. It is protecting both itself and you. Here is a good site to keep in your Favorites file:
http://an.hitchcock.org/repairfaq/REPAIR/F_tvfaq.html
Either way, the back has to come off the set and some troubleshooting has to occur. Expensive? Hard to say. It depends on where you are living. Call your local shops and get a ball park estimate for repairs.
Repair or replace? Well, you can put a brand new 27" TV in your den for a cost of $250-$300. If the repair costs exceed 50% of that, think about buying a new one.
Smokey ;)
We don't mind hearing about the competition on this site. But, we think we do a better job than most.
The problem is located in your High Voltage Supply and deals with the regulator circuit. The high voltage on the picture tube is regulated heavily to prevent X-Ray problems and fires. If the voltage on the picture tube exceeds specified limits, the cut off circuit engages. Hence, you have the flashing LED.
Conversely, the same thing occurs if the High Voltage Supply gets too low. For this, you can assume that the Low Voltage Power Supply is not running up to specifications.
Be thankful your machine shut down. It is protecting both itself and you. Here is a good site to keep in your Favorites file:
http://an.hitchcock.org/repairfaq/REPAIR/F_tvfaq.html
Either way, the back has to come off the set and some troubleshooting has to occur. Expensive? Hard to say. It depends on where you are living. Call your local shops and get a ball park estimate for repairs.
Repair or replace? Well, you can put a brand new 27" TV in your den for a cost of $250-$300. If the repair costs exceed 50% of that, think about buying a new one.
Smokey ;)