Proview 768M - Brak WN, LED zmienia kolor, jak sprawdzić trafopowielacz?

Cytat:

ProView 768M short in damper diode D604. C604 checks good. After installing a new D604 (DMV56) monitor powers up but does not adjust horizontal size from panel. The size is too big. See if there is a leaky Darlington transistor Q301 = TIP122, in the horizontal area.
Proview 770 No power, no lights, nothing. Fuse is good, cleaned brown glue from flyback area. Has about 150vac on primary of T501 and nothing on secondary. Is this likely the only problem?
I need to identify T501 and a source to buy one. Number on Transformer are 730-102-7721 9928 LAE. For this type of component, contact Proview; they will sell parts, but have a minimum. EMC/Proview, 800-776-8439, X5712, Reggie Rosca, parts dept. Have on hand all relevant information, model#, serial#, date of manufacture, part location and marking, etc
Proview 772IM shorted H.O.T. I replaced the transistor (Q615) with the same type 2SC5251, each time. The transistor blows again after 24 to 48 hours of burn-in. I rung the flybacks and yokes, checked for problems in the B+ circuit and checked the ESR on all electrolytic caps. Try 2SC5207A instead of 2SC5251; this type can work in PV772IM chassis where the 2SC5251 fails after a couple days.
Proview cross reference for ic TLS1233N for 14" monitor. TLS1233N is a Texas Instruments RGB preamp IC. Its pinout is different from other IC's for this function (like LM1203), and I do not know any cross