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ViewSonic N2751W 27 in. LCD Television - Page 8 Questions & Answers
Viewsonic 32 inch tv model N3251w just stopping working
I see so many here with no sound/nopicture issues:ISSUES: 1. IF sound main fuse/s are good.2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.3. almost all these sets the troubleshooting involves
checking voltages on the main power board to narrow down theproblem.4. Be safe and if you do not know what you are doing don't open the set.Answers to issues:1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion-----top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.4. Safety first--no TV set is worth getting injured or even killed over.
3/30/2012 1:03:48 PM •
ViewSonic...
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Answered
on Mar 30, 2012
TV will not turn on
iF THE SET is a year or even two old and you have to repeatedly turn it on and on but once it is on it is ok, the problem is in the set's power supply.
All of these sets (every brand) have a "standby Power supply" built into them, it runs 7/24 even if the set is not turned on. One of the areas some companies cut corners on is the filter capacitors in this part of the set: Say the constant voltage is 9 volts and they use 10 volt rated caps, the caps will fail after a year or two from heat.
The reason companies do this is the cost difference say on 10,000 sets between 10 volt versus 16 volt rated caps is a nice piece of money.
If someone opens it and follows the power cord to the supply it will be easy to see, these caps (see photo) have a perfectly flat silver top with creases---any caps puffed up are bad.
Look at the caps and
Before you rate this information let me know what you find, this problem will not just go away and usually gets worse and worse until the unit will not turn on at all.
SD TECH
7/16/2011 9:44:59 PM •
ViewSonic...
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Answered
on Jul 16, 2011
I have
Hi,
Welcome to fixya, how may i help you?
7/9/2011 3:58:56 AM •
ViewSonic...
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Answered
on Jul 09, 2011
I have a ViewSonic N3235w
i understood your problem.....it cause due to interference between different phase of polarised light pulses....
Other problem may be due to your video input check your connection and settings....
otherwise you should check for your digital video processor chip..
Thank you for giving me opportunity to solve your problem.
please give me your Ratings!!
6/22/2011 2:19:07 PM •
ViewSonic...
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Answered
on Jun 22, 2011
Tv will not power up.
Hello,
The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.
The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.
All these can be checked on the power supply board.
But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.
The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)
You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.
What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).
You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress.
Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.
If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.
I hope this helps.
Regards.
6/10/2011 5:32:43 AM •
ViewSonic...
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Answered
on Jun 10, 2011
Hi. I have a SONIQ
Hi leigh_66,
I have a question,
1. what kind of cables(wire) are you using for input connection from your DVD player and Cable?
Jdvillanueva
5/8/2011 11:51:50 PM •
ViewSonic...
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Answered
on May 08, 2011
My ViewSonic N3252w screen goes
The backlight inverter is failing for your tv. You need a direct replacement part. You can find parts on ebay or shopjimmy.com and you can search my the model number of the tv. Once you get the part, allow your tv to be unpluged for 12 hours before beginning any work. This will allow charges to dissipate and allows for a safe work environment. Once you replace the part you will be good to go. Also, check the power supply for popped capacitors while you have the tv open. Replace any bad capacitors with the same uF value and HIGHER voltage value (EX: 1000uF 10v --> 1000uF 35v)
Thank you and please rate.
4/11/2011 1:14:10 PM •
ViewSonic...
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Answered
on Apr 11, 2011
My viewsonic tv will not
Try disabling the lock by pressing and holding [1] (menu) and the down arrow on the front panel for 10 seconds or so. This toggles the power lock on and off for several Viewsonic monitors.
I hope this helps.
Cindy Wells
3/21/2011 11:09:39 PM •
ViewSonic...
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Answered
on Mar 21, 2011
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