Re: Olevia 242FHD-T11 no picture, but has sound
Well I may look for the neon tester again -- do you have a recommended source cadiman?
The reason I may look for one is, as you suspected cashkennedy, I do have a picture -- just no backlight. The flashlight I had been using wasn't bright enough to check for the picture --- I found a brighter flashlight and was looking for the Olevia logo as you suggested and saw it (as well as the picture from the antenna feed once it came on).
I wasn't able to get my old power supply going (my soldering skills and equipment...
WayneI
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Last Activity: 01-10-2012, 05:21 AM
Joined: 12-01-2011
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Re: Olevia 242FHD-T11 no picture, but has sound
Thanks for the reply cashkennedy-- You are absolutely right that this Olevia takes a looooong time to come on. I have it connected to an antenna so I should be getting a picture if I get sound. I ordered a new rectifier for my old power supply board and it just came in so I may try to solder it in tomorrow and see what happens when I install that (on the off chance that something was wrong with the replacement PS that I bought -- not holding my breath).
I also am curious about the neon test that cadiman described (I couldn't...Leave a comment:
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Re: Olevia 242FHD-T11 no picture, but has sound
Thanks for the thought cadiman. I don't have the neon tester you mention so I cannot conduct the test you recommend. I'm struggling to understand what I would learn from the test. If there is power going through the secondary side of the inverter, would I assume the backlights themselves are bad? Or if no power, would it be the inverter? or a bad/missing signal to the inverter? Sorry, I'm quite a bit out of my area here.
The 5v (On/Off?) that goes to the inverter appears to originates from the main board
(run...Leave a comment:
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Re: Olevia 242FHD-T11 no picture, but has sound
I checked the 5v (blue wire) signal to the inverters with the inverters disconnected and measured 4.9v. With only the slave inverter connected, the voltages remains at 4.9v. When I connect just the master (or both master and slave) the voltage drops to 4.2v. Just wondering if that sounds normal or if there is something loading down the signal on the master inverter?
That still doesn't address my lack of picture -- I'm getting a bad feeling that when the power supply fried on this it may have taken several things with...Leave a comment:
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Re: Olevia 242FHD-T11 no picture, but has sound
I have been thinking about the inverter. If it has power (+24v) and the +5v (4.2v in my case) on the blue wire (presumably the On/Off signal), and some level (2v) on the yellow wire (brightness?), is there any reason the backlights won't come on unless there is a problem with the inverter or light? Is there any other signal it should be getting (presumably from the main board)? Do you think the 4.2v may be too low to "switch it on"?Leave a comment:
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Re: Olevia 242FHD-T11 no picture, but has sound
Thanks for the response.
So it seems to me that if I don't have either a picture or a backilite that would point to either the main board or the power (or a failure of both the inverter and the t-con). Does that logic seem sound?
I ordered the board off e-bay and it was advertised as 'new', the seller had a lot of them (probably 100). The supply looks like it was never used, came with the cables still 'bread-tied' together, all inside a foam sleeve. I guess someone could do that to an old supply but it...Leave a comment:
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Re: Olevia 242FHD-T11 no picture, but has sound
I'll take somewhat knowledgeable as a complimant --- THANKS!! I did use the screw that had one of the ground wires mounted to as a reference when I took the measurements (on the master side -- there wasn't one on the slave inverter side so I just used the frame) -- and I'm confident I was reading DC. I didn't check the voltages going to the main board ( I did double (actually triple) check that it looked like I had them installed properly). I had to change the cables with the power supply since the replacement Power Supply I bought...Leave a comment:
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Re: Olevia 242FHD-T11 no picture, but has sound
I could try to get my old power supply going if there is a chance that there is a problem with my new one (I'm a bit concerned about the 4.2v). But since I already installed a new one, if that isn't likely the problem, I'ld rather try to figure out what else might be wrong.
Thanks for all your help.Leave a comment:
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Re: Olevia 242FHD-T11 no picture, but has sound
The TV will remain on with sound playing (The longest I left it on was probably 10-15 minutes -- but there was no indication it would shut off by itself -- I always shut it off with the remote or switch). I did take a flashlight and shine at an angle on the screen, but could see no indication of a picture.Leave a comment:
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Re: Olevia 242FHD-T11 no picture, but has sound
Thanks for the info. I don't see any indication of a screenglow or a picture -- Not a glow for a couple of seconds and then dead --- nothing. So I'm not sure if something is killing the backlite AND the picture or what is going on.Leave a comment:
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Re: Olevia 242FHD-T11 no picture, but has sound
Thanks --- Since I went ahead and got a new power supply, probably won't try to fix that one. Any thoughts on any damage that could cause to other boards when it went out?
I visually checked the original power supply (before I ordered a new one) and couldn't see any indication of burning or any "bulging" caps on the board. I figured something must be shorted on it or it wouldn't blow the fuse immediately when I plugged it in with no load connected.
I'm also a bit concerned with the 5 volt supply...Leave a comment:
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Re: Olevia 242FHD-T11 no picture, but has sound
Did you ever get the Olevia working again? I have a selfish reason for asking in that I am experiencing a similar (but not quite identical) issue with my 242T11.
It began when the TV wouldn't turn on (no blue light -- nothing). I checked and the power supply fuse was blown, I replaced (with a glass slo blow -- all I could find) and it immediately blew again. I disconnected all cables from power supply, put in a fresh fuse and it immediately blew again. I then replaced the power supply and now have sound but no picture....Leave a comment:
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