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supertroopers
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 Posted: Sat Jul 18, 2009 2:40 am Post subject: picture goes off ? |
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hitachi 42pd5000
got a weired problem, screen works ok with good picture but after a short while i will lose picture and it will go to blank background? sometimes will work ok for up to 20 mins and picture will go blank. other times it will work ok then 5 mins later will go blank then picture will come back on quickly then picture will go blank again go off a short while after again. looks like a imminent fault
anyone any ideas i have resoldered all cold joints i could find on power/y & x boards.
many thanks |
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jts1957
Joined: 24 Nov 2008
Posts: 2476
Location: Far, Far Away
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| Posted: Sat Jul 18, 2009 7:42 am Post subject: |
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| More than 3, but less than 7 years old? |
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supertroopers
Guest
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| Posted: Sat Jul 18, 2009 12:43 pm Post subject: |
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| at a rough guess i would say its about 5 - 6 years old yes. |
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minnie
Joined: 18 Aug 2005
Posts: 2880
Location: Hell
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| Posted: Sun Jul 19, 2009 3:45 am Post subject: |
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| When the picture disappears, if you hit menu on the remote does the menu still come up? |
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supertroopers
Guest
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| Posted: Sun Jul 19, 2009 11:58 am Post subject: |
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| when picture disappears, if i try menu on remote no on screen display will show just a blank background, but weirdly if i turn tv to standby for a couple of seconds on remote then switch tv back on the tv will come back on and picture will be on again ? |
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minnie
Joined: 18 Aug 2005
Posts: 2880
Location: Hell
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| Posted: Sun Jul 19, 2009 3:10 pm Post subject: |
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| Does the power lite change? |
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supertroopers
Guest
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| Posted: Sun Jul 19, 2009 3:48 pm Post subject: |
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| no power light stops on green. |
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minnie
Joined: 18 Aug 2005
Posts: 2880
Location: Hell
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| Posted: Sun Jul 19, 2009 4:26 pm Post subject: |
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| Have you measured the VS or VA voltage to see if it drops when the picture disappears? |
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minnie
Joined: 18 Aug 2005
Posts: 2880
Location: Hell
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| Posted: Sun Jul 19, 2009 4:37 pm Post subject: |
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If the lite is green, and it's NOT IN THE POWER SAVING MODE, at connector cn 68 pin 6 if the voltage is 5 volts it's not the power supply, then check connector cn 64 if pin 1 is between 50 and 70 volts pin 10 is between 75 and 90 volts it' the panel.
1) Press the SUB-POWER button and chanel up button on the bottom of the monitor at the same time, and keep it for
more than 5 seconds after the power turned on.
2) The monitor will be turned on, and it will display On-Screen Display of the Self-check result and the failure history as below.
3) Any operation would cancel the Self -Diagnosis mode.
4) The following table shows the OSD symbols and contents of failure PWB in which failure most probably would
be allocated according to the number of blinks. |
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supertroopers
Guest
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| Posted: Sun Jul 19, 2009 5:36 pm Post subject: |
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on psu
cn 68 pin 6 voltage is 5.05v
connector cn 64 measures 61.8v
cn 64 pin 10 measures 84.5v
Self -Diagnosis mode
hr1:ok
h16:ok
h32:ok
h15:ok
h31:ok
h83:ok
--- --- --- --- |
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FAQ
