52HM84 Toshiba DLP with apparent failed lamp (replaced ballast)

Hi Genaro,

Blue led light lit solid and yellow led light flashes is an initial attempt of the set to re-light the lamp.Red led flashes and yellow led light solid means that the lamp won't light up that's why it only has sound without the picture.
Since you've replaced the lamp twice and still the symptoms persist, I suspected that the fault came from the ballast board and not on the lamp itself. If the ballast board gone to malfunction, there's no high voltage will produce to light up the lamp and will sensed by the processor and trigger the error code (Flashes/solid led light with color code).

To verify whether the ballast board is faulty or not, check if the lamp will lit by looking through the lamp door louvers at the rear of the cabinet upon turning on the set.
Please let me know what you will find to assist you further.

Jdvillanueva

The fault is indicative of the lamp circuit, check the lamp fittings, check the power circuit and the ballast.
If the voltage insufficiency is present from the power supply it can lead to low current and thus the lamp will not power up. Also if the replaced lamp is faulty, not of original quality or if there are connector issues, this must be rechecked.
Check all the connectors on the power supply side and the motherboard. remove and reconnect.

Most likely a defective digital module which is part of the light engine and cannot be bought separately. The average cost to replace the light engine assembly is around $800.00.

I would agree. Balast needs to be changed

the ballast is a small rectangular board.it is very easy to change.remove the lamp and you
will see a plug where the lamp plugs into.remove the two screws on that plug.then
remove the 4 screws holding the ballast in.remove the ballast and install the new one.

It is possible the lamps may be defective or that they may be the wrong replacement for this model, as it may have a different wattage setup with the ballast. If you want to try to order the TB25 lamp from a different vendor, you can order the original Toshiba replacement lamp for this model (52HM84) from a major Toshiba parts distributor at the link below:

Toshiba 52HM84 Replacement Part TB25 Lamp / Bulb

ballast

how do I change the lamp?

the ballast or the DMD are the only other two possiblities. you will need to trouble shoot if you would like a link to the service manual let me know, they email it right after purchase and offer free tech support.

the ballast should make momentary arcing sound and orange flash in its spark gap tube when it 1st trys to light the lamp. look for it in the darkness it will be easier to spot, as you listen for it. make sure you are buying toshiba factory replacement lamp.