Unit turning off after displaying red pc chip icon
This unit had previously been working fine and is very new.
Now when it is turned on the Toshiba start up screen displays for a few seconds, then a red pc chip icon displays in the top left hand corner. The unit then shuts down the lamp and after a minute turns off completely. Before this LED lights on the unit show 'On' red lit, 'Lamp' orange lit, 'Fan' green lit. The manual does not reference this sequence.
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The link to the article explains the the cause of the white syndrome none of the previous internet experts have a correct solution. I have the same problem the link to the article attached is for a Mitsubishi projector but all the chips are the same. http://www.fixyourdlp.com/2012/04/26/solve-the-mitsubishi-white-dot-problem-for-under-200/
This is an indication that either the lamp is bad or the ballast is bad. I would try a new lamp first. Also, there are air flow sensors in the lamp area that should be cleaned. If you have access to compresed nitrogen, try blowing out the entire unit to remove all dust and debris. Check to be sure that the fans are turning freely as well.
Apparently, the above posted steps do work, but they are finicky. The manual suggests that you do the aforementioned steps with the remote - I had tried with the remote and when that did not work I tried directly on the controls on the unit itself. Neither had worked - after multiple attempts, hence the posting above. The solution was that the various steps need to be done speedily - when I previously did it I apparently did not press the sequence rapidly enough. Nothing in the manual suggests that this is the case (and in fact I thought I had previously followed the steps in rapid succession on at least one of the many times I had tried, but apparently not quickly enough). I never could get this rapid succession of steps to work with the remote (as the manual said I needed to), but I did ultimately get the rapid succession of steps to work when done directly to the unit itself. The first three steps need to be completed within approximately 1-1.5 seconds, the final push of the volume+ button did require 2 or more seconds before the process was recognized (and complete). Never did have a single FixYa party try to address my issue - perhaps you only really get responses from them when you pay for their monthly service.
Make sure the air intake filter has been removed, dissassembled and cleaned. Reset the lamp timer after replacing the lamp. Confirm allo fans are operational, and don't forget to allow for the cool down time after the unit is turned off. AC must remain connected for the unit to cool down the lamp after the unit is turned off.
Most fans have a sense line to detect the fan is working properly, Possible the sense circuit has failed. The unit should not start if it thinks the fans are not running. Possible thermal problem with the sense circuit, since your unit starts up then stops.