Have retrace lines forming recently. Set is from 1997. Suspecting cap problem off flyback voltages to vertical Deflection or blanking diode? Havent found anyone that has a manual. Like to get a little more mileage as it has great sound and still reasonably good picture. Akai brand model CTX-2790 27 inch Pure Flat CRT television. Was one of the last crt sets sold by Sams Club.