Question about ViewSonic VPW450HD 42 in. HD-Ready Plasma Television
Hi, My tv is not functioning at all, the green light stays on but nothing shows up on the screen. Before this happened I noticed the picture suddenly converts into lot of dotted lines suddenly and then it would go blank. Any suggestons is much appreciated.
I have a VPW450HD set that I just fixed. I get the feeling that they are not all the same inside, but this may be the same problem many of you are having. When turned on the green light on the front of the set would come on, if in a dark room I could see that there was some light to the screen ( not much ) but no picture and no sound. When I pushed the power button to turn the set off - it would not turn off. I had to turn it off from the main power switch on the back.
If you take the back off you will see a large square board in the center of the TV ( about 12" X 10" ). I would describe this as the main power supply board. Near the top there is a two wire connector with a Red & Black wire in it. Follow this wire up to the next board. It is a smaller board ( about 5" X 3" ) with the Red & Black wire connector near the top right corner. I would describe this board as a secondary power supply board. It sends the power down to the input board. On the secondary power supply board there is a six connector plug on the left side of the board. This is where I found the problem with mine. The connector is burnt and melted because of a " cold solder " joint. Carefully remove the secondary power supply board - you may be able to use the same connector if it is not to burnt and brittle. The six pins on the solder side of the board need to be re-soldered. These pins are thicker material than the other solders, and so do not solder well in a wave solder process. the pins do not get hot enough to solder properly, so over time an opening is created between the pin and the board.
Make sure you do not change the order of the wires if you have to replace the connector or if you solder the wires directly to the board. If you use the same pins and connector - check that they will make good contact. Often there is a residue on the pins and the small clips in the connector. I took the wires out of the connector and cleaned them ( one at a time ) with a small wire brush. A razor blade also cleans them well.
I hope this helps some or all of you !
Let me know if it worked for you or if you have questions.
Posted on Jan 06, 2009
Andrew's solution worked perfectly! Mine turned out to need the joints to be resoldered and the pins cleaned off. The plug was slightly burnt but still usable. Great and clear instructions!
Posted on Dec 22, 2009
I was told that mine was caused by lightning and was dead !!! it is 2010 this was kept in a cabin rarely used, so it was a freebie and the forementioned 6 pin plug was the problem im glad i found thios site , works perfectly although no atsc tuner
Posted on May 08, 2010
I just fixed mine with Andrews advice. It worked great and was very easy. Thanks
Posted on Feb 20, 2010
I had the same problem and used El Drew's fix and the TV is now working perfectly. Thanks for a detailed troubleshooting guide- it saved me lots of money. NS
Posted on Nov 01, 2009
Thanking you for the posting how to repair Viewsonic VPW450HD Plasma. I had the same problem I manage to repair it the way you described. Thank you again for the wonderful posting.
Posted on Aug 24, 2009
I HAD the same problem; I followed El Drew's advice (Jan. 6, 2009 posting) and was able to fix mine! It's been put into semi-retirement. I hope to get a few more years of life out of it.
Posted on Mar 03, 2009
When the green light only comes on, and no TV or sound, simply wait 30 seconds. Then change press the channel up button. Seems that if you turn off the TV when you are on High Definition mode or another source and you turn it on, the TV does not know what to address.
Posted on Aug 14, 2008
Can anyone tell me if they have permanently fixed this problem with their Viewsonic VPW450HD ?
I opened it, cleaned it and reseated everything. It worked for 20 mins and then same problem.
Did anyone try and replace the Logic Board NA18106-5006 as was suggested.
I cannot even find it on the 'Net.
SHOULD I THROW THE TELEVISION !?
spending $600 on repairs does not seem worth it as I can get a new TV with a 2 yr warrantly from Costco for $800 and it is lighter and uses far less electricity.
Posted on Jan 26, 2008
I have found my problem to be in either the connectors or removable "chip creep" caused by thermal expansion/contraction. I took my unit apart and reseated all connectors and ICs that weren't soldered in and put the unit back together and now my unit is working again!
Posted on Dec 25, 2007
What Happened does this story get a ending?
Posted on Dec 25, 2007
I just wanted to add that I have the same TV w/ the same exact problem. As the problem happened as soon as the warranty expired, Viewsonic is not interested in supporting me as a customer. (Very bad customer service over there, considering I paid over $3500.00 2 years ago) They would not allow me to extend warranty after purchase either. Personally, I will NEVER buy "Viewsonic again. Stick to Sony, Samsung, Panasonic, or even Mitsubishi... Problem Description: As per Viewsonic Tech that inspected my TV, the problem seems to be the part: Part: Logic Board Assembly Part#: NA18106-5006 Pls. note that this part has been "out-of-stock" at there website for over 14 months. If I could get it, I would change it myself, but Viewsonic doesnt make it easy for the consumer. After 6 months of phone call & emails, I was able to discover that for out-of-warranty TVs, there is only 1 "Viewsonic Authorized Service Center" in the US. They charge a $325 flat fee & will fix whatever is wrong. I will be shipping my TV to them soon (at an additional s/h charge of $500, from NY) I will post the results. Anyway, here the info on the "Viewsonic Authorized Service Center": (Good Luck) Edwards Repair Center 14500 Proctor Avenue City Of Industry, California 91746 (626) 855-8188 www.edwardgroup.com
Posted on Jun 25, 2007
I will buy all your broken tv's??? just an idea.
Posted on Aug 17, 2009
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