I have a flatscreen monitor whose (separate) PSU has died and needs replacing. It's a 12V 3A unit, and as luck would have it I happen to have a similar one going spare from a netbook which I no longer have. Q1: is there any reason why this putative PSU wouldn't be fit for purpose - ie is there any other characteristic other than 12V/3A that I need to consider here? Q2: Assuming we've made it past Q1 - unfortunately the (LV) plug which connects to the monitor is slightly but crucially differently sized to the original, so it won't fit - both are standard-looking concentric plugs (ie this sort of thing: but the central pin is evidently larger on the monitor than it was on my netbook (though the external diameter looks the same). What are the specs for these things - how do I work out what plug I need to buy? I'm assuming it's possible to buy a solderable version; otherwise everything I have here is welded together - is there a neat way of cutting and rejoining the LV flex so I could recycle what I have? (I wouldn't want to bodge it as I'll probably pass this monitor on to someone else once it's repaired...) Thanks for any thoughts

The polarity of the plug- sometimes the centre is +ve, sometimes -ve. Sometimes marked on the PSU or the socket on the device it powers. Maplin, CPC, or Farnell all sell plugs; they are specified by the length of the metal connector, it's inside diameter, and inside diameter. It can be tricky to measure, so you may have to buy a selection. Probably the neatest way would be solder and heatshrink, but you should be able to get a solderable plug.

Wrong 12V plug on PSU for computer monitor?

Dec 03, 2013 21 Replies

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Scott M 12 years ago

I'm confused why you keep saying jack plug. Power plugs are quite different in design and I don't think have ever had any parameter of 3.5mm.

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Mike Tomlinson 12 years ago

In article , Scott M writes

Clearly.

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