Hi,
We were visiting Grandma last weekend and found the Vizio E321vl TV was having trouble. Thought someone could answer a question about the power supply, maybe help in determining which board needs to be replaced.
Found the TV with no power, logo is out, and not turning on with power button or remote. I did the reset with holding down the power button, waiting and plugging back in. When it is plugged back in the logo is amber for less than one second and goes out dark again. No power.
Power supply board has no voltages present at the connector while the main board cable is plugged in. When I disconnect the main board cable from the power supply board, the 5.2V is present and steady on the first 3 pins of the header. No AC ripple.
I reconnected the main board cable, plugged the TV back in while watching the 5.2V lines. The 5.2V tries to come up for a split second and dies. The 12V or the PS ON control voltage is never comes on, always 0V. The amber logo tries to come on, but blinks off when the 5.2V dies.
Could the main board be loading down the 5.2V standby voltage or does this look like a power supply problem? Once narrowed down to the board level, I'll swap out whichever is the most likely culprit.
Appreciate any help...Dave
We were visiting Grandma last weekend and found the Vizio E321vl TV was having trouble. Thought someone could answer a question about the power supply, maybe help in determining which board needs to be replaced.
Found the TV with no power, logo is out, and not turning on with power button or remote. I did the reset with holding down the power button, waiting and plugging back in. When it is plugged back in the logo is amber for less than one second and goes out dark again. No power.
Power supply board has no voltages present at the connector while the main board cable is plugged in. When I disconnect the main board cable from the power supply board, the 5.2V is present and steady on the first 3 pins of the header. No AC ripple.
I reconnected the main board cable, plugged the TV back in while watching the 5.2V lines. The 5.2V tries to come up for a split second and dies. The 12V or the PS ON control voltage is never comes on, always 0V. The amber logo tries to come on, but blinks off when the 5.2V dies.
Could the main board be loading down the 5.2V standby voltage or does this look like a power supply problem? Once narrowed down to the board level, I'll swap out whichever is the most likely culprit.
Appreciate any help...Dave
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