VIZIO 42" LCD TV
Inverter boards, both Master and Slave blows occationally. Within 10 of 12 days
The fault is due to its circuit design, and this fault occur to most models of Vizio TVs. Start voltages and current will be high, and CCFL lamps changes internal parameters after 1 or 2 years of working period. To lower the starting current is the only repair can be done, by inserting proper value of resistor, capacitor, and zener diode to lower the starting current. This fault is not curable by customer, as it need through knowledge in electronics, and ability to follow the circuit and schematic diagram.
VIZIO - P42HDTV10A
No picture, no sound and screen do not comes ON.
Y_Sustain board fault. There is a fuse [4A] at Y-Sustain on-board. A suface mount type device. Check whether it has burned out. If it has opened, try replacing (YPPD-J018C). In most cases this work will help you. Anyway, it will be best to replace the Y-Sustain board as card basis. Contact the nearest authorised service center for Vizio to buy this board.
VIZIO - GV42L HDTV LCD
No picture, No sound.
Main board should be checked, provided power supply remains OK.
In most cases the IC U-11 will get damaged. Replace it will solve the problem.
VIZIO - P50HDTV10A
No picture, No sound. Set powers ON.
The fault is with Y-Sustain board. [YPPD-016] IC should be checked. Replace this IC, or replace the bard as card basis. Replacing it as card basis will be the best.
VIZIO - VP50HDTV20A
Turns ON, shuts down immediately. No picture.
Check the Top and Bottom buffer boards to these model sets. Replace them at one time. This is a common problem the this model.
VIZIO - VP422HDTV10A
Set works fine for 10 to 15 minutes, and picture and sound goes out. No Menu on sereen. Only flashing lines.
Main board fault.
Replace the main board. Buy it from authorised service center for Vizio.
VIZIO - GV471HDTV10A
The problem is intermittent. Sometimes works properly. Sometime no video or sound or both.
The [1.8V] voltage regulator MPS1117 on the main board should be checked. If this voltage drops too much, or not at all, this type of fault can occur. Replace this regulator first. It is on the main board [U5]. If this do not help, replace the main board.
VIZIO VX371HDTV10A
The set tries to turn ON. No video, vertical lines, and no sound. It shuts OFF after a short while.
Check the fuse at (+12) volt line on the main board. Replace the voltage regulator [FMPS1117] on the main board.
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