Sanyo model #DP42647 no video
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From: stokesbr on 29 Oct 2009 17:14 This is my first flat panel LCD to work on, and need a little help. I am not a pro, but have been working on tube TV's for a few years now. This set has no video or on screen display. Audio is fine. The screen also pulses at power up for a few seconds then stops, only to leave a blank dark blue screen. I have googled and only found it could be the sustain and driver boards at fault, and replacement is the fix. I suspect component replacement would do the job, just not sure where to start, especially with no schematic. Anyone here worked on this particular set or can get me started in the right direction? The lack of on screen display suggests? Any help will be greatly appreciated. Thanks as always group.
From: Max Harding vk3jin on 30 Oct 2009 00:10 stokesbr(a)cox.net wrote: > This is my first flat panel LCD to work on, and need a little help. I > am not a pro, but have been working on tube TV's for a few years now. > This set has no video or on screen display. Audio is fine. The screen > also pulses at power up for a few seconds then stops, only to leave a > blank dark blue screen. I have googled and only found it could be the > sustain and driver boards at fault, and replacement is the fix. I > suspect component replacement would do the job, just not sure where to > start, especially with no schematic. Anyone here worked on this > particular set or can get me started in the right direction? The lack > of on screen display suggests? Any help will be greatly appreciated. > Thanks as always group. shine a torch on to the back pane and see if you can see a picture using the torch as the back light. this will prove if you have video.
From: PlainBill47 on 30 Oct 2009 13:59
On Thu, 29 Oct 2009 14:14:45 -0700 (PDT), stokesbr(a)cox.net wrote: >This is my first flat panel LCD to work on, and need a little help. I >am not a pro, but have been working on tube TV's for a few years now. >This set has no video or on screen display. Audio is fine. The screen >also pulses at power up for a few seconds then stops, only to leave a >blank dark blue screen. I have googled and only found it could be the >sustain and driver boards at fault, and replacement is the fix. I >suspect component replacement would do the job, just not sure where to >start, especially with no schematic. Anyone here worked on this >particular set or can get me started in the right direction? The lack >of on screen display suggests? Any help will be greatly appreciated. >Thanks as always group. This is most likely a problem with the LCD panel itself; possibly in the bias supplies on the panel electronics. It is also possible the problem is in the TV control board, and for some reason it is not sending video information to the display. PlainBill |