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Vizio E421VA no pic or sound

HipMusic man

Jul 8, 2013
6
Joined
Jul 8, 2013
Messages
6
the tv was given to me for free to repair and either keep or sell. so im trying to repair it. i have replaced the power supply with what i believe to be a fully working power supply but there was no change. when i test the power supply the voltages are correct. however, when i test the voltage going out to the tubes (backlight) there is no reading. it says high voltage all around that area so i suspect there should be something on the meter. any ideas?
 

davenn

Moderator
Sep 5, 2009
14,240
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14,240
The tube's backlight ?

is it a plasma screen ? a LCD panel ??

LCD panel backlights often use fluro tubes with ~ 3000V supplies
they will "bite" or kill your meter if you measure incorrectly

have you google searched for a service manual or schematic ?

Dave
 

HipMusic man

Jul 8, 2013
6
Joined
Jul 8, 2013
Messages
6
The tube's backlight ?

is it a plasma screen ? a LCD panel ??

LCD panel backlights often use fluro tubes with ~ 3000V supplies
they will "bite" or kill your meter if you measure incorrectly

have you google searched for a service manual or schematic ?

Dave

lcd

thats a lot of volts.

not yet
 
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