It sounds like the high voltage portion of the power supply (ballast). Turn to the solder side of the P/S board and orient it so the silkscreen is legible. Check for burnt resistor R573, 2Kohm. It's center of board, 3/4" from bottom edge. If that's OK, check 3.3kohm resistors R621, 622, 625, 628, 629, and 630. They're in the top right corner. They tend to crack. Good luck.
Still looking for a schematic, i'm a tech for 44 years myself, but on unfamiliar territory don't travel without the road map. The bulb probably isn't getting high voltage, but i'm unfamiliar with the circuitry. y'all showed having the schematic. but i couldn't operate your forum page
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Sounds like overheating. The dust filters by the lamp module may be clogged. You have to remove the lamp and clean them as noted in the user manual. If you don't have the manual you can search for it on line. They suggest using compressed air and isopropyl alcohol to clean these filters. Of course, the blowers also need to be operating and external input and output vents not blocked or restricted.
The manual says it might be because the power went out when it was on. Just a note here, as projectors age they become more sensitive to power outages. When not in use turn off completely if you can. They have an on/off button.
Otherwise not sure but think you may need to replace the fan. Try cleaning it first but gently.
The color wheel has failed in youtr projector. There are 4 pieces of glass in the color wheel which fit togeter in a "pie" formation and they are red, blue, yellow & clear. This wheel is spun by a motor. The glass is glued to the motor's hub, and, when it fails the glass segments are thown off the hub. This gives you a B&W picture because all of the light is allowed to shine through the optics all of the time. Replace the color wheel with Toshiba part no: 23125963. It will be about $65. No soldering is involved, just use care with the ribbon cable to the motor. You will need a no. 2 phillips screwdriver and a set of jeweles screwdrivers to do this.
The lamp ballast which ignites the lamp has failed it sounds like. The red flashing lamp is the tell tale sign with a good lamp installed. Make sure the lamp door is closed too, there is a door switch that can also trigger the red lamp and no startup. There is a company in San Diego CA that can repair the unit called PROJECTOR DOCTOR
blinking red light normally only occurs when lamp needs replacing.
one thing to try other than replacing the lamp is resetting the lamp used hours timer (page 33), and if this solves the flashing light you may get some more hours out of your bulb
The wheel noise is supposed to be normal and an element of the design - don't think they thought that one through too well. Saying that, if it is all the time and painfully loud then something (possibly the bearing or the housing that the bearing sits in) needs bending back or replacing - toshiba do not suggest any long term solution to the problem at all.
Hope this helps
please bother toshiba about this, and it may help stop them selling unfinished designs. We must all fight for a better future etc. etc. etc.
Hope this helps