Question about Televison & Video
Have a WD73927 Mits DLP. In the process of changing the color wheel but before I tear into it...it just started this new problem. The sound stops but the picture continues to play for an extended period then the set shuts down. You can turn it back on immediately after it does this and it works fine... but may operate for hours before doing the same little cut out. Any ideas while I'm going to have it tore down anyway? It does display a message on the screen when you turn it back on that says AV disc is reconnected ?! Thanks
Try the soft reset this model should have with set on Menu,1,2,3 enter.
Posted on Dec 22, 2012
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Posted on Jan 02, 2017
SOURCE: Picture cuts out
If still under warranty or if you have no electronic repair experience you should take the set back to the shop or to a repair person. Some of the solutions described below can be dangerous, TV's are very hazardous to service. Even when plugged out, TV's can store very high voltages. The five blinks(count them again just to be sure) is an error codes that stands for the following: "FIVE Blinks---AKB circuit (AKB), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the C board, also check Q218, 219, 220 on the A board. Also unit be in IK blanking, try turning up screen slightly." So what is the AKB? It is Auto Kine Bias; a circuit that holds the video OFF until the picture tube (kinescope) is warm enough to run video. So, if there is trouble within the AKB it may not be turning on the crt. Or, the crt could be cold, or there could be power supply problems (which I favor because the audio is gone, too, which means it is not a "video only" matter). Therefore, I do not favor replacing the C board (or A board as indicated in the url above). I favor finding out why the AKB circuit is not functioning. It is necessary to get the set to come ON long enough to make sure the crt is heating up. You may have to manually defeat the protection circuit and force the set to come ON. If you can find the ON relay you may be able to hold it ON manually - at least long enough to find out more symptoms, but not too long or some further damage may occur. Go to: http://www.schematicsforfree.com/archive/?path=Sony%2FVideo where you may find a schematic or service manual for this set - or one that is close/similar enough to be of great value. Last comment: Some sets will, upon failure of the AKB function, after a few seconds, go into diagnostics - which is similar to protection. So, the audio may be working okey. Turn the set on with the volume up; if you hear audio for the until the set cycles into the flashing light routine it means the audio is really good. So, check that carefully. You may have to do a hard reset to cause the AKB function to reset. So, do this: Unplug the power cord for 4 hours or more. That will reset everything. Hope this helped, or gave you a general idea, but please don't take a further step unless you know the safety issues involved. Good luck
Posted on May 22, 2006
SOURCE: No picture, new lamp
Did you reset the hours on the lamp with the menu options on your set? Sometimes, if you do not do that it can mess with the tv performance thinking that its over hours. It needs to be reset to 0 again...
Posted on Sep 24, 2007
the hlr series had a few problem with intermittent turning off. one was the lamp door cover switch, the other was the thermostat.. neither one is very costly and a good tech should be able to replace bothe parts at the same time..
Posted on Nov 29, 2007
SOURCE: no picture but has sound
If the screen turns bright blue then you may have a bad blue crt(picture tube) I suggest an on site diagnosis by a Sony ASC to verify if it's the crt. Crt's can run up to $150.00 plus installatin and alignments.
Posted on Jan 23, 2008
SOURCE: I have a Samsung HLN467WX
I suggest going to the following link. they will have the service manual for your model available by email after purchase and they offer free tech support to help you with the diagnosis and repair of your DLP heres the link in case you want it.
Posted on Apr 25, 2008
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