What DC voltage does an average LCD monitor use?
If you’ve already got the monitor, then it doesn’t matter what voltage an average one uses–you care about the one you already have. Like knave said, if the power supply is external it’s easy to just read it off there. If it’s internal, well, the couple of LCD monitors I’ve opened up have had power supply boards with several different voltage outputs all in use simultaneously. So you would have to have some kind power supply in there anyway, rather than just bypassing the whole thing and hooking 12 volts directly to the board somewhere. And if you don’t have the monitor already, then you want to look for one with an external 12 volt DC power brick. Probably an older model since most of them seem to be coming with internal power supplies these days.
