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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Mitsubishi Unisen TV LT-52151 takes long time to show picture
I have a Mitsubishi Unisen LT-52151 that once turned on, it could take up to 2 minutes before the picture shows. The power button illuminates but no picture till much later. This is an LCD 51 inch flat screen. Things I've tried:
1. I've unplugged the TV, replugged it in 2. Used a different HDMI device and a different HDMI cable and proved it was the TV, not any of the HDMI devices connected. 3. Verified the "fast boot" option is enabled. Tried turning this setting on. Still slow. Turned it back on, still slow. Any thoughts? Thanks |
#2
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Mitsubishi Unisen TV LT-52151 takes long time to show picture
On 20/08/2015 19:41, Analogman2 wrote:
I have a Mitsubishi Unisen LT-52151 that once turned on, it could take up to 2 minutes before the picture shows. The power button illuminates but no picture till much later. This is an LCD 51 inch flat screen. Things I've tried: 1. I've unplugged the TV, replugged it in 2. Used a different HDMI device and a different HDMI cable and proved it was the TV, not any of the HDMI devices connected. 3. Verified the "fast boot" option is enabled. Tried turning this setting on. Still slow. Turned it back on, still slow. Any thoughts? Thanks Try small-scale directed hot-air over the caps in the ps while dormant. |
#3
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Mitsubishi Unisen TV LT-52151 takes long time to show picture
"N_Cook" wrote in message ... On 20/08/2015 19:41, Analogman2 wrote: I have a Mitsubishi Unisen LT-52151 that once turned on, it could take up to 2 minutes before the picture shows. The power button illuminates but no picture till much later. This is an LCD 51 inch flat screen. Things I've tried: 1. I've unplugged the TV, replugged it in 2. Used a different HDMI device and a different HDMI cable and proved it was the TV, not any of the HDMI devices connected. 3. Verified the "fast boot" option is enabled. Tried turning this setting on. Still slow. Turned it back on, still slow. Any thoughts? Thanks Try small-scale directed hot-air over the caps in the ps while dormant. About the same as my thoughts. The capacitors in the power supply section may be going bad. Before too long it may not come on at all. |
#4
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Mitsubishi Unisen TV LT-52151 takes long time to show picture
"Analogman2" wrote in message ... I have a Mitsubishi Unisen LT-52151 that once turned on, it could take up to 2 minutes before the picture shows. Any sound at this time ? Arfa Any thoughts? Thanks |
#5
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Mitsubishi Unisen TV LT-52151 takes long time to show picture
I plan on pulling of the back cover today to see if any caps in the PS are bulging. Maybe check with an ESR meter as well. As far as sound, the sound went out shortly after I bought the TV a good 5 or more years ago but since I have surround sound, I never bothered to do anything about it. The set is very heavy and requires 2 people to move it.
If this is an ESR capacitor problem, does heating the caps up cause ESR to lower? |
#6
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Mitsubishi Unisen TV LT-52151 takes long time to show picture
"Analogman2" wrote in message ... I plan on pulling of the back cover today to see if any caps in the PS are bulging. Maybe check with an ESR meter as well. As far as sound, the sound went out shortly after I bought the TV a good 5 or more years ago but since I have surround sound, I never bothered to do anything about it. The set is very heavy and requires 2 people to move it. If this is an ESR capacitor problem, does heating the caps up cause ESR to lower? Probably, but why even bother to check ? If your ESR meter says it's bad at room temperature, then it's bad, end of ... Not having had any sound for five years doesn't help with remote NG diagnosis, as it's quite an important indicator as to what exactly is and isn't working when it's wrong Arfa |
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