The TV broke in a similar manner in Jan. of this year--no picture, but the red power led on the front came on. The TV repair place stated that the convergence board needed to be replaced, so I had it fixed for about $300. So now within the last month (and just out of the repair's warranty) it goes blank again. I assumed it was the same problem as before and wanted to same some momney. I did some research and found that I could replace the STKs for about $40 and a little soldering--I am not new to soldering. I found the same model STKs online and went ahead and replaced them, being very careful to mount the heatsinks properly, make good solder joints, and not apply too much heat to any of the STK leads. I put the TV back together and I find that that nothing is resolved--still no picture.
So, my questions are: What else could be broken if I have no picture and the STKs have been replaced? Or is it more likely that I installed the STKs improperly. In my humble opinion I did some rather good soldering, so my hunch is that something else is broke.
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Re: No picture, but red light on front comes on
If one your convergence IC's is bad then you will still see a picture but the colors will not line up, especially around the edges. I have never seen a Toshiba projection set completely lose the picture because of a defective convergence IC. If your vertical output IC has failed or cracked loose then that is exactly what you will see - no picture! The vertical output IC is usually on the same board as the convergence outputs which explains why it worked last time, even if the tech was not 100 percent accurate in knowing exactly what was wrong - he just changed everything. Resolder that vertical output IC and make sure it is getting power. If you still have no picture after that then have a qualified tech look at the set.
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It probably got zapped with power. Regardless of how it broke, the first place to start is the main power supply board. Some people repair the caps, which without looking more in depth at some of the troubleshooting forums, I couldn't tell you which one is most often the culprit. It looks like the power supply boards are going for about $25 on ebay, and I would feel pretty confident replacing that at that price.
If that does not fix it, something on the main board could be "crowbarring", or sapping power from power supply from where it is needed to boot up, however, that would only be a secondary test to making sure our power supply is a good one.
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Hi can anyone please help me a have a isis tv only a year old was working fine last night aye want to put it on tonight and the red light flashes for a bit than comes on but no sound or picture what could it be the scream is just dark
When the TV has been powered on long enough for the lamp unit to get hot, it may take several minutes for
the picture to appear on-screen. See "IMPORTANT NOTICE ABOUT HOT LAMP R
When the TV has been powered on long enough for the lamp unit to get hot, it may take several minutes for the picture to appear on-screen
in the following situations:
• When the Quick Restart™ feature is set to OFF and you turn the TV off and then on again within a few minutes.
• If the TV is on when a short-term power failure, power surge, or other similar power failure occurs, such that the TV loses and regains
power within a few minutes.
This is a property of DLP TV lamp technology and is NOT a sign of malfunction.
If this occurs, the green LED on the TV front panel will blink (and the red LED will be lit solid) until the TV is finished restarting the lamp
and the normal picture appears. If BOTH green and red LEDs are blinking at a one-second rate, you will need to turn the TV off and then
on again to restart the lamp.
ESTART" on page 8. if this no good check the lamp in side to see if it's not burn't out good luck
Now,u plug in the tv u get a solid red standby power red LED light in the front of the LCD panel right?When u push the power button on the remote u hear a clicking sound?Only one clicking sound,not the power supply board problems.It the Tuner board problems.But u can make sure it the power board problems or not.By taking the tv aparts check the power board,that board where the a/c power cord goes into it.Look all around the power supply board check for these leakage capacitors,they alway bulges up it top or puff up it top.No bad leakage capacitors,then it not the power supply board problems.
I'm sorry, I don't have a solution, but I seem to be having a similar problem. When I turn my TV on, the green light comes on like it's powered up, but then the TV turns itself back off and the red LED light flashes. I can't do anything to turn it on or anything.