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Power supply for monitor - electrical question

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AnitaPeterson

AnitaPeterson

Diamond Member
Hi folks,

I have a strange LCD monitor (which I want to give away), and it's missing the power supply... The factory specifications are 12V 3A (as per Google).

I don't have power supply with those specs. The closest I have is 15V 2A. Would this work, or do I risk frying the damn thing?

Please advise... thanks much!
 
It won't work since power supply won't supply the minimum allowed current of 3 amps. Also, the output voltage doesn't match as well. You need at least a 12V 3A power supply or higher amperage.
 
Last edited:
no....

your specs call for 35 watts max

yours has 30 watts max.

Applying too much voltage could kill your LCD also, however, since the specs call for more power, you may just burn the PS.

I advise you to get the correct PS.
 
It is possible it would work but without knowing the actual circuit inside the monitor I wouldn't use it. Nothing uses the supplied voltage directly inside the product anymore almost always switching it into another voltage but without knowing the specific circuit you could be supplying more voltage than the circuit can handle, though most regulators are in the 10-15V range once they pass 9Vdc.
 
Sorry for my ignorance... I'm trying to understand these matters, to see if I can pair this monitor safely with a spare power supply, and I don't want to buy a power supply especially for the damned thing, considering that I'll be giving it away.

From what I gather by reading your answers, the total power, measured in Watts, is obtained by multiplying voltage and amperage (by the way, what does amperage actually refer to? I need to look this up)...


Here's another question: would a power supply of 12V but 2A work? If I understood you correctly, this would give only 24W, as opposed to 36W, but what would this actually mean? I guess a lower current (probably) won't burn the LCD, but would it overtax the power supply?
 
AnitaPeterson said:
S

Here's another question: would a power supply of 12V but 2A work? If I understood you correctly, this would give only 24W, as opposed to 36W, but what would this actually mean? I guess a lower current (probably) won't burn the LCD, but would it overtax the power supply?
Click to expand...


There is more too it than just the watts. Without knowing how the monitor is designed internally using anything less than the rated supply could damage the monitor. You can go higher on the amperage , as much as you want, 5 or 10 amps if you have it but don't go less or the supply may burn out.

You actually have the perfect supply already. Connect the monitor to one of the pc's 12V (yellow and black wires) on a drive connector.
 
You need to know what plug it uses as well. Not all 12vdc plugs are the same.
Is the receptacle on the monitor round with a single pin in the center?
 
Stay as close to 12v as possible, and close or anything higher than 3a. You could probably get away with slightly less, but it just means it will work the PSU more, and it could potentialy blow. So go 3a or higher to be safe. It can be hard to find replacement adapters. A computer PSU would be perfect, but WAY overkill and bulky. Maybe check ebay for a laptop adapter or something. Some modding will be in order to get it to fit. Probably easier to hard wire it unless you can find a plug that fits.
 
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