Re: Vizio VW42LFHDTV10A Inverter Board Failure

It is likely the case, but to be sure, you probably have to disassemble the TV to get the board out and check the part number. So far, the V1.3 replacement for the V1.2 boards have been holding up. So if you have V1.2 or below on your boards (if they have the same model numbers otherwise), it is possible that they will fail.

F...

Re: Vizio VW42LFHDTV10A Inverter Board Failure

Just to make it easier to find this inverter replacement thread for other TV types, here is the list from ShopJimmy of TVs that might have this problem and may use this board set to do the repair:

ARION AD-LC42F
DIGITAL LIFESTYLES LT42322
JVC LT-42DG8B
LG M4210C-BA
MAGNAVOX 42MF337B/37
MAGNAVOX 42MF521D/37
MAGNAVOX 42MF531D/37
OLEVIA 242-S11
OLEVIA 242-T11
OLEVIA 542-B12
PHILIPS 42MF337B/37
PHILIPS 42PFL5332D/37
PHILIPS 42PFL5522D/05...

Re: Vizio VW42LFHDTV10A Inverter Board Failure

Well...that went pretty well. I received the boards from ShopJimmy today, 2 days from when the order was accepted on EBay. I think it would have been 1 day if I went directly to the ShopJimmy site, and it might have been worth the extra $$ for someone in a hurry. The boards were EXACT replacements except V1.3 rather than V1.2, and they appeared to have some of the Philips Mod components on them, so I think they should not fail in exactly the same way. I installed them with no problem. Powered up and had backlight. I checked the TV on...

Re: Vizio VW42LFHDTV10A Inverter Board Failure

As recommended, I checked and found good 24V supply for the inverters at the power supply connectors. So I did an order for the replacement boards at ShopJimmy (Philips 996510007721 Inverter Kit). This is about all they have left in stock at this point. When they arrive, I can confirm they have the Philips mod in place. As mentioned, the picture shows zeners and caps in the right place, and the board is stamped V1.3. My boards without the mods are stamped V1.2. I ended up doing the order through Ebay with make offer. A bit of a savings,...

Re: Vizio VW42LFHDTV10A Inverter Board Failure

I looked at the "exact" board replacements from Shopjimmy, and the pictures actually show the mod components in place for the Zener and Cap parts (can't see the resistors if mounted under the board). So, if they ship what they show, their kits should include the mod. That makes things easier....

Re: Vizio VW42LFHDTV10A Inverter Board Failure

Since I see an image on the screen, I am assuming most of the power supply functions are still good. Unless the 24V supply only goes to the inverters, I would expect it is still OK, but I can try to check it and the other signals.

If I buy exact replacement inverter boards (6632L-0470A and 6632L-0471A), would I expect them to have exactly the same problem? So I would expect to need the mod for them to last? Might other inverters be compatible, but not have the original glitch, specifically 6632L-0412A/6632L-0413A inverter...

I've searched what I could, but did not find the relationship between blown Mosfets and other problems on (or off) the Vizio inverter boards. My Master inverter board (6632L-0470A) looks like it has a partially "blasted" pin on the main integrated circuit (pin 26, I think). And when I measure across the Mosfets, one of them (MQ1) measures 76 ohms, so I expect it, or something else in it's circuit, is blown. Other Mosfets on the Master and Slave inverter (6632L-0471A) cards measure 8.5K as expected (according to other posts). None of the caps looks puffed. And the fuses on both boards...