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sounds like the vertical adjustment has spanned beyond the screen, causing it to jump up and then upside down. after the cover is removed look for vertical adjustment and with a non-conductive screwdriver, adjust it a little bit either way to see if it fixes it, if it doesn't fix it, then look again for the right one.
Whether you mean rolling, as in loss of vertical hold, or irregular jerks, the problem is due to a ;pwered voltage. As rear projection TVs age certain capacitors lose the ability to maintain full voltage.
You CANNOT repair this problem yourself. There are DANGEROUS high voltages in such a set - HEART ATTACK level voltages which can persist for WEEKS after the set is turned off.
You must call a trained technician for service.
I have a 3 yr old 55 inch mitsubishi TV and when I turn it on the green light starts flashing and I must reset the TV about four times before it finally comes on has anyone had this problem if so what solution did you have?
yes it can be fixed depending on your model number if its the VS50605 they have a kit to repair the PIP module which controls vertical sync (Rolling) or you can bypass the module to correct it but you would lose the PIP function. Let me know if you need more info.