Help: Will this power supply work with this 17" LCD Monitor? - HotUKDeals
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Help: Will this power supply work with this 17" LCD Monitor?

Liddle ol' me Avatar
7y, 11m agoPosted 7 years, 11 months ago
I have an LCD monitor (12V, 2.5A) but have misplaced the power pack. I have a spare power pack that is 12V, 1.7A from a rechargeable battery charger. The connector is the same.

Q: Can it be used for the monitor? I haven't tried it and don't want to unless I'm sure it won't damage it.

The full spec of the power pack is

Input: 100V~240V AC 50/60Hz 25W
Output: 12V DC - 1.7A
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Liddle ol' me Avatar
7y, 11m agoPosted 7 years, 11 months ago
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Comments/page:
#1
Yeh, should be ok, its mainly about that Voltage, but as the P/s is less Ampage than the monitor then it should be fine
#2
yeah do it
1 Like #3
dean3988;4363046
Yeh, should be ok, its mainly about that Voltage, but as the P/s is less Ampage than the monitor then it should be fine


Wrong way round. A power supply doesn't 'force out' a certain current - the load device draws a certain current. In this case the monitor is rated to draw more than the PSU is rated to give out - which means the PSU will potentially be run outside its rated supply. To use a 3A or 4A rated PSU would be fine; to use one rated less than the monitor is not.

It will probably work but the monitor will try to draw more current than the PSU can give (especially with the brightness turned up to full). So it will work in the short term but long term could cause the PSU to overheat or fail in other ways - so its a bit risky.

Edit - Why expired?
#4
dean3988
Yeh, should be ok, its mainly about that Voltage, but as the P/s is less Ampage than the monitor then it should be fine


jah128
Wrong way round. A power supply doesn't 'force out' a certain current - the load device draws a certain current. In this case the monitor is rated to draw more than the PSU is rated to give out - which means the PSU will potentially be run outside its rated supply.

It will probably work but the monitor will try to draw more current than the PSU can give (especially with the brightness turned up to full). So it will work it the short term but long term could cause the PSU to overheat or fail in other ways - so its a bit risky.


Thanks both. Yes, jah - that's my understanding too about the drawing of power, except I couldn't have said it like that! :) And I also guessed it was potentially risky. Anyway, you sound like you know what you are talking about and it's not worth taking any risk. I'll but a new power supply with the correct specs. Thanks. :thumbsup:

( btw, I didn't expire this. Someone else did before I had a chance to see these responses. Reported)
#5
Liddle ol' me;4363183
Thanks both. Yes, jah - that's my understanding too about the drawing of power, except I couldn't have said it like that! :) And I also guessed it was potentially risky. Anyway, you sound like you know what you are talking about and it's not worth taking any risk. I'll but a new power supply with the correct specs. Thanks. :thumbsup:

( btw, I didn't expire this. Someone else did before I had a chance to see these responses. Reported)


FWIW I've run monitors on underrated PSUs before and they do work - if anything they will be a bit dimmer as the backlight doesn't get quite as much power but they still work. Long term though its not really that safe as the PSU will run hotter than it is designed to :thumbsup:
#6
jah128
FWIW I've run monitors on underrated PSUs before and they do work - if anything they will be a bit dimmer as the backlight doesn't get quite as much power but they still work. Long term though its not really that safe as the PSU will run hotter than it is designed to :thumbsup:


Thanks again - but it looks like I might be selling this monitor on so can't take chances. If I'd been told it would be ok, I would have still explained the situation to the buyer and asked if she was willing to take the chance. But since there is a long-term doubt, I won't even offer that option. Don't want to use or sell something that isn't 100% fit for purpose. If the sale doesn't happen, I'll probably just take the chance and use it as a spare monitor in the kids room where it will rarely be used.
#7
Liddle ol' me
Thanks again - but it looks like I might be selling this monitor on so can't take chances. If I'd been told it would be ok, I would have still explained the situation to the buyer and asked if she was willing to take the chance. But since there is a long-term doubt, I won't even offer that option. Don't want to use or sell something that isn't 100% fit for purpose. If the sale doesn't happen, I'll probably just take the chance and use it as a spare monitor in the kids room where it will rarely be used.


not a good idea!, kids fiddle, put things on top of PSUs and leave things on.
fair old fire risk associated with this type of activity..

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