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The specs for this monitor is a 60 Watt, 12 Volt, 5 Amp power adapter. The voltage must be the same. You can always get an adapter with a higher Amperage rating, but never get one with less, as this can overheat the adapter and damage it. I was not able to locate specs on whether the voltage to the monitor is DC or AC... most are DC. If this is the case, the observe the polarity at the monitor. Power adapters have a positive and a negative... center and outer contact, Make sure that the power adapter matches that of the monitor, else it will not work.
The AC Adapter supposed to lite GREEN not red... Try a different AC Adapter if you got one..
If it still the same problem after changed another AC Adapter... Then it's your backlight inverter are busted. Need to replaced a new one or returned...
Hi! If anyone would like a Power adapter for their Ultra LCD30-500 and LCD40-500- please email me Acosta.firstname.lastname@example.org... And I’ll be able to order one…
I too own a Ultra Lcd40-500 HDTV. Bought it from HSN.com back in 2006. My power adapter burned out 2 weeks ago, and to my dismay PWW, or should I say POS has gone bankrupt. I looked everywhere online and here in San Jose,CA thinking I would find a replacement or at least someone that could repair the blown capacitor( 630v vpmm), thermitors(IRFD460A) and varistor( SCK206). After calling every power supply company, distributor, and retailer, had no luck finding a match to this crazy looking 9din pin adapter. Disappointed I gave up on a replacement and took it to various repair shops for repair and was told without schematic would be nearly impossible to replicate the power Output. Finally this one shop was able to replace the burned out components and it seem to work at the store. When I got home with it..no luck..red light would come on…but no light on screen. L Not wanting to give up or trash my LCD. It was time to dig further…I did some research through my employer; a SemiConductor company here in Santa Clara, CA. Needless to say this power adapter has driven me crazy….It has been exhausting... But finally just yesterday I got the break needed…I found a manufacturer in Taiwan that has these power supplies for both the Ultra lcd 30" and 40". I was told they only sell to Component or Electronic Suppliers. I’ve asked my employer to see if I would be able to order one on their behalf using their account. Happy ending! My power supply is on it’s way. I was told it could take up to 4weeks for delivery. But I’m just glad to have a replacement.
You will need at least a 4 amp rated regulated 12 Volt power supply. These are commercialy available from most electronics parts suppliers. They come on a circuit board. You can mount it in your own case and use the original Viewsonic wire end. If you do a google search for 12 volt reglated power supplies you should find many of these.
However, with a second-hand Sprint AC adapter with 3A, 12v adapter, the screen blinks on and off intermittently. Obviously there is some difference here between a class 2 adapter and a power supply box.