Working on a Mitsu. WS-55315 that has audio and no video. No video on any input or any OSD info. The problem is in the Doubler board connection that stands on the signal board. I have resolder dozens of pin connections on both boards thinking I have a cold solder joint. After doing all of this if I slightly press the Doubler board to the side I get a picture, press it a little more and it goes out. Is there a specific component I should be looking for. Any help? Thanks. firstname.lastname@example.org
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Re: No Picture Audio Only
It sound like the components are ok. Are any of the component leads
discolored from excessive heat? If so it may be that the resolder looks
ok but is not actually adhering to the lead. Use solder wick or a
desolder iron to remove the old solder, clean the lead(s) by scraping
with a sharp knife edge to bare good metal and resolder.
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It sounds like this TV is being used only for the PS3. We'll need to troubleshoot this through a process of elimination.
If you're using Component Input 1 and audio, try using Component Input 2 and audio instead. If this set of inputs provides working audio and video - you can stop. Or, try going back to Input 1 once more. If Input 1 now works - you may have simply made a better connection. If it doesn't - then there's probably an issue with input 1 on the TV.
If moving to Input 2 above still didn't solve the problem, you should try using a different set of audio cables between the HDFury and the TV. If it now works, the original audio cables are faulty.
You can check the HDfury setup on another HDTV with component inputs with it connected to an HDMI cable. if the HDFury wors, you know the device and all the cables work. If you do this test and it works with your PS3, then you know that the PS3 is providing good video and audio signals via HDMI. If the problem follows the PS3 - then it's the PS3 at fault. If everything works perfectly on the second TV, then there is some issue with the audio amplifier / inputs / speakers of the Mitsu TV. You could get a cheapo stereo amp and speakers - or a set of computer speakers for audio - it all depends on how much you want to spend for sound.
THERE IS, aside from having the set taken to a shop, One other thing you can try---
NOT THE RESET BUTTON ON THE FRONT OF THE SET!
If the original Mitsubishi remote works on the set---this set has a hidden menu---it also in that menu has a HARD RESET---puts set back to the condition is was when new in the box--will come back on on channel 3 in the air band and any labels you placed on any of the video inputs (ie--named a input DVD etc) will be gone.
If you have OSD but no video either you have some problem with a single voltage coming out of the power supply(shop repair) or if you had a power outage or the power cord was removed with the set on---the hard reset may fix it---nothing to lose--set is not usable now---
Let me know if you want to try the reset and I will tell you how----
You description of "...no video but with audio..." could indicate a number of possibilities:
power supply section;
horizontal section .
Other ideas are:
Since it has still sound, then the power supply is a least likely possibility;
Since it has still sound, then the tuner is a secondary suspect;
Since the menu shows, then the vertical and horizontal would be highly unlikely.
which eaves us the video amplifier or electronic/soft selector as the most likely culprit.
Further diagnosis would of course would require a fair
familiarity of electronic components/circuitry and safety procedures,
use of a DVM and a soldering iron. It would be to your added advantage
access to a service manual or at the very least a schematic diagram
with voltage readings. Should you be uncomfortable performing a DIY
(do-it-yourself), perhaps your best bet would then be to seek the
services of a qualified professional.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards. Thank you for using FixYa.
Good Day; More than likely your TV has "COOLANT" (ethylene glycol) on the circuit boards. This fluid comes from the CRT's (picture tube) this fluid is used to keep the CRT's cool, such the name. This fluid from the CRT's leak when TV is on for long periods of time, the chamber expands and the seals leak. One can remove this fluid by using "acetone" & small brush. The fluid is hard to see, use bright light, they spots can be smaller then a DIME. Also, the fluid can corrode the parts and traces on the boards. To protect the TV in future place heavy plastic or thick cardboard over affective area, make sure TV has proper air flow around TV. If after the fluid has been removed and TV still does not work, call an Authorized Service Center to come out and repair TV after giving you an Written Estimate. The boards are not available. Always try resetting the TV by unplugging it for one minute then plug back into A/C outlet and ALWAYS UNPLUG TV BEFORE ATTEMPTING ANY REPAIR ON THE TV. Good Luck, big IRISH.
Finally got a tech to come out to the house ($99 to diagnose). He determined it was the Doubler Board. Got a quote from this company to repair it for around $800. I was able to watch over his shoulder. The board is really simple to replace. I just need to find it.
Check to see if all video/audio connections are right. If you know it's all hooked up correctly then look in audio and see if anything is turned off. Maybe internal speakers. Do you have cable or satellite, or you going thru RF connector or AV inputs?