Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.repair
|
|||
|
|||
vizio tv
|
#2
Posted to sci.electronics.repair
|
|||
|
|||
vizio tv
If a new, good PS board doesn't fix it, then it's likely there's a short on
one of the other boards that's pulling down the voltage and keeping the supply from turning on. |
#3
Posted to sci.electronics.repair
|
|||
|
|||
vizio tv
On Sat, 15 Oct 2011 05:45:06 -0600, "Vince Schmitt"
wrote: Hi I have a Vizio TV MDL VW37L HDTV20A The pilot light is on (orange) push the power button and nothing happens, the light stays orange, the set is dead, I tried a new power supply board and still the same thing. Thanks for any help I can get. Vince Probably a problem with the main board. Some models of Vizio are notorius for a failure of U33 (a AS1117 voltage regulator) on the main board. More information is available at www.badcaps.net/forum PlainBill |
#4
Posted to sci.electronics.repair
|
|||
|
|||
vizio tv
On Oct 15, 3:52*pm, wrote:
On Sat, 15 Oct 2011 05:45:06 -0600, "Vince Schmitt" wrote: Hi I have a Vizio TV MDL VW37L HDTV20A * *The pilot light is on *(orange) *push the power button and nothing happens, the light stays orange, the set is dead, I *tried a new power supply board and still the same thing. * * Thanks for any help I can get. * * * * * * * * * * * * * * * * * * * * * * * * * * * Vince Probably a problem with the main board. *Some models of Vizio are notorius for a failure of U33 (a AS1117 voltage regulator) on the main board. * More information is available atwww.badcaps.net/forum Why do I have to join before I can look at the pictures? Are they dirty? |
#5
Posted to sci.electronics.repair
|
|||
|
|||
vizio tv
On Sun, 16 Oct 2011 10:43:36 -0700 (PDT), spamtrap1888
wrote: On Oct 15, 3:52*pm, wrote: On Sat, 15 Oct 2011 05:45:06 -0600, "Vince Schmitt" wrote: Hi I have a Vizio TV MDL VW37L HDTV20A * *The pilot light is on *(orange) *push the power button and nothing happens, the light stays orange, the set is dead, I *tried a new power supply board and still the same thing. * * Thanks for any help I can get. * * * * * * * * * * * * * * * * * * * * * * * * * * * Vince Probably a problem with the main board. *Some models of Vizio are notorius for a failure of U33 (a AS1117 voltage regulator) on the main board. * More information is available atwww.badcaps.net/forum Why do I have to join before I can look at the pictures? Are they dirty? Why are you afraid to join? PlainBill |
#6
Posted to sci.electronics.repair
|
|||
|
|||
vizio tv
On Oct 16, 12:33*pm, wrote:
On Sun, 16 Oct 2011 10:43:36 -0700 (PDT), spamtrap1888 wrote: On Oct 15, 3:52 pm, wrote: On Sat, 15 Oct 2011 05:45:06 -0600, "Vince Schmitt" wrote: Hi I have a Vizio TV MDL VW37L HDTV20A The pilot light is on (orange) push the power button and nothing happens, the light stays orange, the set is dead, I tried a new power supply board and still the same thing. Thanks for any help I can get. Vince Probably a problem with the main board. Some models of Vizio are notorius for a failure of U33 (a AS1117 voltage regulator) on the main board. More information is available atwww.badcaps.net/forum Why do I have to join before I can look at the pictures? Are they dirty? Why are you afraid to join? I don't expect to be able to contribute to the forum, so it would not benefit from my joining. For security I would have to create a unique user name and password. Managing a plethora of account names and passwords is onerous. I prefer the usenet model with open access. |
#7
Posted to sci.electronics.repair
|
|||
|
|||
vizio tv
Why are you afraid to join? PlainBill I no longer join unless I am desperate for information. Joining often means that your contact information is sold or shared. |
#8
Posted to sci.electronics.repair
|
|||
|
|||
vizio tv
"Vince Schmitt" wrote:
Hi I have a Vizio TV MDL VW37L HDTV20A The pilot light is on (orange) push the power button and nothing happens, the light stays orange, the set is dead, I tried a new power supply board and still the same thing. Thanks for any help I can get. Vince I just saw this post (I'm a little behind in checking Usenet), so hopefully this will help. I repaired my 32" Vizio (similar insides to yours, I believe) which had a similar problem. In my case, replacing the mainboard fixed the problem. It seems that voltage reagulators on the mainboard are common points of failure. I took the easy way out and just replaced the mainboard which contains all of the logic, the tuner, and audio amp. I was also having audio problems, so this fixed everything. Here are 2 sources for parts: http://vizparts.com/index.php http://www.searspartsdirect.com/part...tion?pop=flush Get the part number from the sticker on the mainboard inside the TV. Note that some part numbers have been updated. That was the case when I looked up the mainboard part number for my TV. You can buy new or refurbished parts. I chose to get a refurbished part from Sears Parts Direct. The board was $110 plus $20 for tax and shipping and I received it within a week. The hardest thing about this repair was getting the back cover off. There are about 25 screws on the back cover alone. Next, you need to remove a metal RF noise shield that covers the mainboard. That's another 12 or so screws. Once all of that is done, 5 cable connectors need to be disconnected. Two of them have the smallest pitch between pins that I have ever seen and they need to be very gently removed to prevent damage. I sweated through that part. After replacing the board and the back of the TV, I powered it up and waited for what seemed like a very long time before a startup message appeared on the screen. Apparently, when the boards are reconditioned, all settings are 'zeroed' out like a brand new TV. So after removing and replacing what seemed like a zillion screws, and spending $130, the TV is back to normal. Hope this helps. -Nick |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Vizio | Electronics Repair | |||
FS:Vizio 42" Plasma | Electronics Repair | |||
Goodbye RCA .. Hello Vizio HD | Electronics Repair | |||
Vizio L32 Power Supply Board | Electronics Repair | |||
VIZIO lcd set with lines across | Electronics Repair |