Mitsubishi. Why won't it turn on?

Anon, the bulb/lamp plugs into the ballast, The attached videos shows the ballast and location near the end of the video. Check the attached links. Good luck
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Mitsubishi Toshiba Samsung DLP TV Bulb Won Turn On DIY Easy DLP Ballast...

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Hi W Bloom,


First of all, thank you for contacting Fixya.com regarding your TV problem.


My first advice is to do system reset by pressing the "Power" button key at the front panel and hold it for 10 secs.


Please check also if you can access the "Error Code Log" by pressing the "Menu" "3" "5" "6" "4" in sequence before the unit gone to shutdown.


You've mentioned that the bulb has been replaced just last Sept and now it won't come on. The lamp can't be test using the multimeter but you can make a visual inspection to determine its condition. Most of the faulty lamp has an obvious burnt mark. There's a possibility that the symptoms is caused by busted lamp but in your case, if it is a genuine lamp replacement, then high chance that the fault is not the bulb.


You need to check the ballast board but not the high voltage output of it feeding the lamp. No voltage coming out from the power supply board to the ballast board can produced the same symptoms. You have to check the this voltage at connector CJ1, you must get 325V to 340V. Check also the lamp enable at connector CJ3(pin 4) you must get a low voltage upon turning on the set to confirmed that the mainboard giving a signal.


If there's no voltage at CJ1, then the fault is on the power supply board.

If the readings are normal, and still the ballast won't ignite (you can hear a slight snap sound when the ballast board trying to ignite), then you have to replaced it.


Click the link below to order online.


http://bigtvsale.blogge.rs/2011/05/31/discount-replacement-mitsubishi-oem-pwb-ballast-938p178010/


http://www.shopjimmy.com/mitsubishi-938p178010-lamp-ballast.htm


Please let me know if you need further assistance.


Good luck and take care!


Kind Regards,


Mjsazon

ck for the 330v ac going to ballast from power supply

These tvs are known to have sensor issues. EX: door lamp sensor failure. Thermal fuse failure (above bulb)....Check all sensors on the tv and replace with new and you will be up and running again.


Lastly, always double check all connections and check the bulb ballast as well.


Thank you and best of luck!

the bulb wire go to the ballast board, they do wear out over time but is usually down to capacitors, also depending on how much you watch the tv its about time to change the bulb as they only last a certain amount of time any way. when the tv is reset properly it will count down on time used. from new bulb. its only an estimate, if you are having difficulties seeing the screen the bulb is on its way out.

340v should be on power pwb plug PL on the 1 and
5 (GND) pins for the ballast. and the ballast plug CN should also have the 340V with pin 1 of that plug being GND nd pin 3 should have the 340V If the PL plug on the power board is low the power pwb has a problem most likely the doubler circuit. If CN plug voltage is high say 360V the ballast is suspect.

If you have a voltage meter you can pull the bulb out and check for continuity by placing the probes on the power plugs of the bulb. If you have continuity the bulb should be good, and it may be the lamp ballast.

The ballast for the lamp too should be replaced along with the lamp. If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/

replace Ballast Board it is what turns Lamp on! Call Encompass 1-800-638-3328 You can somtimes find good deal on Ballast Board at E-Bay

Its far more likely the result of the power pwb capacitors that have failed. As the 34 code will appear if the capacitors fail on the Power PWB. You can get the V26 DLP Power repair kit at the following link.with free instructions
http://servicemanuals.vstore.ca/product_info.php/pName/mitsubishi-v26-dlp-power-pwb-repair-kit/cName/repair-kits