Sony Wega KV-36XBR400 Television
If you mean, the picture comes in, then flashes to black, & back on to
a normal picture, & it keeps flashing at a regular interval, you MAY
have the "common" Sony bad picture tube! If you have access to a proper
picture tube booster, you could try to boost it, or sent it to a repair
shop! This isn't always repairable. Dani.
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