Lost Picture When we turned on the tv this morning (worked fine last night) there was no picture, just colors streaming horizontally across the screen. The audio is fine. ???

It could be your mainboard. How long did you have the TV?

color wheel

possible voltage spike has took out a bufferboard in the tv just have to find a tv repairman to look at it 4 u

problem can also be in VPB (video process board).But without the model name its very hard to tell you more

The vertical Ic maybe are damaged and some of the electrolitic capacitors near by

If i am to understand this correctly, this is a rear projection television. Inside there may be 1 - 3 " color " control boards that control the picture before going on to the projector. an accumulation of dust / dirt / debris has adverse affects on electronic componants, make sure they are dust free (compressed air cleans them off quite well. If using a home compressor, make sure there is a vapor filter to remove water from the airlines.)

If they are clean, and as you said you recently had the television serviced to replace the projection lamp, take the television back to the repair shop to have them determine the problem.

If you yourself replaced the projection lamp, be sure to check all connections are properly seated if you had to disconnect something, make sure they are in the proper places, and any connections are securely connected.

If all else fails, have a local electronics / television repair person check the unit for faulty componants.

The green CRT's (color picutre tube or color wheel, or ballast) will need to be tested for replacement.
It is quite common with these tv's

You will need an ohmmeter and or voltmeter and test each component for currency and accuracy

Picture is reduced to a straight horizontal line across the center of the screen.

thanks for your detailed description of what happened.
replacing the vertical output i.c will correct the problem.
the reason it failed was bad connections on it.

Rarely picture tube also shows the same symptom. High pitch sound is due to through deflection area LOT power supply is loaded. Compulsary horizontal output transister short. From your statement i think Lot puncture takes place. Change LOT and horizontal output transister and check tv is now working.