I have a flashing green light on the PSU when plugged into the monitor [sx-19a] when i unpluged it the light goes solid, the light on the MON is a faint yellow when powered up.
Bad power supply. The light is green when it is not plugged into the monitor because there is no load on the power supply. When you plug it in the monitor tries to draw current, nothing the PSU can handle now, so the light blinks. The PSU can not provide the amps that the monitor needs.
Get a new power supply, you can find them on ebay. Just make sure the voltage and amps match. It is ok to buy a power supply with a higher amp rating, the monitor will only take what it needs. Also make sure the power plug that plugs into your monitor matches.
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