Philips 58PUS7805/12 showed no picture; after T-Con replacement, shows halo
Hello, this is my first post on this forum, and my first attempted to repair a TV.
My Philips 58PUS7805/12 stopped working recently. It is not that old, about 5 years. We were on a trip for a few days and when we came back, it had stopped working out of a blue (Perhaps our house was hit by a lightning strike? Don't know.)
Read from a guide that I should test if the screen shows picture with one of the T-Con cables disconnected. Did that, it showed perfect picture (first on left, later on right side).
Read also that we should test what happens if we start TV with one cable working and then connect the second cable. Did that, got perfect picture on the first try; however, on second and third attempt, TV showed some weird stripes on full screen, so we stopped trying that.
Ordered a T-Con board replacement (mine was CCPD-TC575-009 V1.0STCON575G). Initially they sent a wrong one, CCPD-TC695-002 V1.0STCON695G. Tried it nonetheless. It showed full picture, but with a certain halo. Did "reset settings" from TV, same result.
Asked for an identical-to-original T-Con, they sent a CCPD-TC575-009 V1.0STCON575G. However, the result is the same - shows full picture, with a certain halo. Sometimes when I turn on the TV, the problem is not there for a few seconds and then appears (and then it is there constantly)
Currently, when we start the TV with only one of the T-Con cables connected, the image is OK for a couple of seconds, and then the halo kicks in (on that side of the screen). This is currently the same with old and new T-Con.
Also, checked "client service mode" (or how it is called) to see if it reports any errors; it shows just 000...000.
About the halo: it seems to be a deterministic pattern (see image). This is best understandable if we do "reset settings" on TV - there is a spinner in middle of the screen (see image) - when it turns, there are stripes that move above it in a deterministic pattern. It's almost if every pixel has multiple (lighter) copies of it copied above it. Sorry for the low quality image - I intended to upload a 5s 1.5mb video of the effect for clarity, but that attachment type does not seem to be supported. Video shows the effect best. Perhaps I could upload .rar of that video?
We thought that perhaps we introduced some dust into the TV cables by repeatedly opening and closing the set, so we tried to clean the T-Con and main board cables with Isopropyl alcohol gently. That did not have any effect.
What should be the next step of diagnosing the issue?
Thanks in advance!
My Philips 58PUS7805/12 stopped working recently. It is not that old, about 5 years. We were on a trip for a few days and when we came back, it had stopped working out of a blue (Perhaps our house was hit by a lightning strike? Don't know.)
Read from a guide that I should test if the screen shows picture with one of the T-Con cables disconnected. Did that, it showed perfect picture (first on left, later on right side).
Read also that we should test what happens if we start TV with one cable working and then connect the second cable. Did that, got perfect picture on the first try; however, on second and third attempt, TV showed some weird stripes on full screen, so we stopped trying that.
Ordered a T-Con board replacement (mine was CCPD-TC575-009 V1.0STCON575G). Initially they sent a wrong one, CCPD-TC695-002 V1.0STCON695G. Tried it nonetheless. It showed full picture, but with a certain halo. Did "reset settings" from TV, same result.
Asked for an identical-to-original T-Con, they sent a CCPD-TC575-009 V1.0STCON575G. However, the result is the same - shows full picture, with a certain halo. Sometimes when I turn on the TV, the problem is not there for a few seconds and then appears (and then it is there constantly)
Currently, when we start the TV with only one of the T-Con cables connected, the image is OK for a couple of seconds, and then the halo kicks in (on that side of the screen). This is currently the same with old and new T-Con.
Also, checked "client service mode" (or how it is called) to see if it reports any errors; it shows just 000...000.
About the halo: it seems to be a deterministic pattern (see image). This is best understandable if we do "reset settings" on TV - there is a spinner in middle of the screen (see image) - when it turns, there are stripes that move above it in a deterministic pattern. It's almost if every pixel has multiple (lighter) copies of it copied above it. Sorry for the low quality image - I intended to upload a 5s 1.5mb video of the effect for clarity, but that attachment type does not seem to be supported. Video shows the effect best. Perhaps I could upload .rar of that video?
We thought that perhaps we introduced some dust into the TV cables by repeatedly opening and closing the set, so we tried to clean the T-Con and main board cables with Isopropyl alcohol gently. That did not have any effect.
What should be the next step of diagnosing the issue?
Thanks in advance!
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