My daughter complained that her flat screen monitor had packed up so I took a look.
First problem - trying to get hold of a circuit diagram for this proved impossible (if anyone here has one I`d be obliged if you`d email me a copy).
The complaint was no picture and standby light flashing. A quick shuftie showed also that the screen was trying to light up but giving up after 3 or 4 attempts.
Whilst trying to track down a diagram I came across numerous references to this, and other similar monitors, on forums all over the net. Seems they`re all packing up with the same fault.
Taking a hint from one of the posters I dismantled the monitor and found several low voltage electrolytic capacitors starting to bulge. I ordered replacements and fitted them today .... BINGO! The bugga powered up first time. Job done.
I think this fault description and remedy covers a number of models and possibly some other brand names.
The items I replaced were all electrolytic capacitors in the low voltage (secondary) side of the power supply. Component numbers were in the region of C212, C213, C214 etcc and consisted of six 470uF and one 220uF. All rated at 25Volts and 105 degrees C.
I`m putting this here in the hopes it might save someone binning an otherwise good monitor.
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Don`t mess around inside monitors unless you know what you are doing - I hate collections for wreaths :o

I wonder if it's a similar scenario to LCD TVs were there are only 2 or 3 panel manufactures but they are all sent out to different electrical companies who just put their brand on them or fit them in to their units. In other words, your Proview problem may extend to other monitors.

Was it a magnifying glass and solder job?

The rot began to set in during the late eighties when companies began "leasing" famous brand names to no-mark manufacturers.
The "Bush" brand, which had disappeared after being bought by The Rank Industries, suddenly showed up again, except they were made in Turkey. Soon after followed a whole raft of Turkish delights all virtually identical. I had fun in one shop challenging the salesman to justify a £100 price difference between two sets which were essentially the same inside. ....... I won.
After this came the Indian TVs, and then the stuff from China.
Compared to the sets put out by Panasonic, Sony, Mitsubishi and the like, the build quality was/is rubbish. But because they are so cheap (you wouldn`t believe it), there is no longer any need for an army of service engineers.. they can afford to swap your telly for a new one in most cases.
Back to your comments MJB..
I have no doubt at all that there are several brands of monitor which are identical inside.
Also, this kind of fault is not unusual in most kinds of electronic equipment. Components are (1) under-rated and therefore running close to their limit all the time; and (2) packed so closely together that they run hotter than they were designed to do.
Yes, the old eyes aren`t as keen as they used to be so I did resort to a bench magnifier, and that was just to put the sugar in my tea!

I think the comment about replacing them is the key here. It's not often these days that anyone has anything repaired. I think if my monitor packed in I would probably just go out and get a new one.
Hopefully my monitors (Philips and Asus) and my Sony telly are made of better stuff.