SOURCE: Viewsonic n3250w LCD-TV
That chirp indicates a feedback on the secondary transformer in the switch mode power supply and needs to be either repaired or replaced. A good shop can have this one back up in an hour or so - assuming they have the parts on-hand... If they have to replace the SMPS you'll naturally have to wait a few days. Most shops don't have such specific parts on-hand and will have to order it.. Replaced an entire SMPS for an Akai recently with the same symptom, chirping. Turned-out to be the regulators and two MOSFET's. A MOSFET is a metal oxide semiconductor field effect transistor.. In laymen's terms a switching gate. But below the two MOSFET's, when they went thermal they burned the board and several small traces which could not be bridged. The SMPS was $70.00 plus shipping, and you're probably going to be somewhere in that ballpark on this too if the whole SMPS has to be replaced. Good Luck Bill
SOURCE: Viewsonic N3250W won't power on
Got the same problem for a N3250. I'm not an electronic engineer and will attempt to fix my TV. Therefore I got the FSP2123F02 ($49.75)and now they have a harness 4WT0062302GP ($8.90) that will do a quick plug and play and will avoid any solder of the pins. That is my understanding can anyone corroborate this procedure. By the way I got both products from electronica-usa.com
I repaired it on June 28th with the lsit of parts above
More deatil information here (of the problem)
http://forum.eserviceinfo.com/viewtopic.php?p=149367#149367
List of photos
A) new Power supply on TV
B) new Power supply and new 12 pin connector (plug and play)
C) old board
D) TV picture in HD
SOURCE: ViewSonic N3250w
The defective power supply module will cause the following symptoms:
No Display and no Sound, Then Power indicate light changes from Green to Red.
Turns OFF by itself.
Needs to be unplug to make it work.
Works for a few minutes then turns OFF.
I repair these power supplies, if you need further assistance [email protected]
SOURCE: Viewsonic N3250w no power
Look at the power supply first; look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Parts: http://www.shopjimmy.com/catalogsearch/result/?q=ViewSonic+N3250W+
Please post back what you find
SOURCE: Viewsonic N3250W I replaced the power supply board
I had the same issue and the inverter board fixed it, you can find it at shopjimmy.com.
90 views
Usually answered in minutes!
×