Power (i.e. "switching adapter") needs to be replaced.

You may buy any adapter with 12V, however, make sure the new one also matches at least the same Amp. of the monitor. Universal laptop adapters are ok to use.

try www.12vadapters.com
You can use higher current rating but not lower, the voltage should be the same.

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague

No, it's way too low power. Most probably you need 12V and something like 4-5A (4000-5000mA). The higher the current rating (Amps) the better, some reserve is always good to have; the unit will draw as much current as it needs, the rating means the maximum current that the power supply can deliver.

Good luck, and please come back with a rating/testimonial if helped :)

Most LCD monitors use switching power supply, it has regulated DC output. Your monitor needs 12vdc output at 4.5~5amp
See your power supply here:
http://www.google.com/products?rlz=1T4GGIH_enUS282US283&q=Scanport+N7+power+supply&um=1&ie=UTF-8&ei=YyYoTKG_HYSFnQemq8GoAQ&sa=X&oi=product_result_group&ct=title&resnum=3&ved=0CDIQrQQwAg

You can measure the adapter output with a voltmeter. The output should match the voltage marked on the adapter. This model uses a 12-volt adapter.

If the adapter doesn't have any output, it may be because the wire has broken inside the cable near the plug from flexing. It's possible to repair this by soldering on a new plug. Sometimes it's tough finding the right plug, though; some brands of equipment use oddball sizes.

You can also purchase replacement adapters. Several sources came up after a search for "scanport n9 adapter". Here's one on eBay. You'll be able to find what you need.

The best thing is to look for broken ones on ebay and recycle the parts to get the 6 you have working again.

You may also want to try parts.com if you can get the part numbers.

it seems a whole lot of people have moniters with fatal ailments as i do as well. after spending $ 150.00 at computor stores & still had the same problem with my Moniter I just orderd another new moniter & the Problem is fixed..

I Think there killing moniters on purpose

Yes the adapter must have an output of 12vdc AND rated for a least 4.0A output!

you can set positive and negative of the universal power adapter 110v to 220v.