14V adapter for 19V monitor

[paparazzo79]

Hi guys.
I ordered used LG 34UM88 monitor which should come with 19V 5.76 A adapter from LG.
I payed for monitor but sadly I got scammed it came with 14V 58W Samsung adapter.
Luckly I did not even tried to turn on monitor, but I think they used the 14V adapter.
Is it possible to use 14V adapter and what already damage could happen?

[paparazzo79]

I have Samsung adapter with my own monitor.
Its specs 59W 19V.May I use Samsung adapter with LG supposing the plug is the same (will check it)?

[paparazzo79]

So a seller sent me this one, I tried and monitor hope so will work okay. It is a charger for Sony Vaio.
This one is only 3A.

[momaka]

Are you sure the original adapter is supposed to be a 19V 5.76 Amp one? That's roughly a 110 Watt adapter. As far as I know, no LED-backlit monitor uses that much power. Most use 15-20 Watts, some even less. I suppose if set to full brightness and "gaming mode" on, it might be using a bit more. But even then, I doubt it would be that much more.

According to search I found online, this monitor is rated for about 58 Watts maximum power consumption... meaning the monitor will probably use a lot less.

The 14V adapter might be OK if there's nothing inside the monitor that needs more than 14V, which is what I suspect. Usually there's a buck regulator in there that derives 12V, 5V, 3.3V, and all of the other lower voltages needed on an LCD mainboard. The LED backlight driver shouldn't care that much either, as it's usually a booster circuit.

Just check the polarity and the plugs of these adapters. Power-wise, they both seem capable enough. The Sony Vaio has a voltage closer to the original, so it should definitely work fine.