Hyundai L19T lcd monitor. Monitor powers up but power indicator light keep blinking and display image just blinking too. What may cause that?

If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.
https://www.youtube.com/watch?v=TR2iWN6b-LY
LCD TV Repair No Power Power Supply Common Symptoms Solutions How to...

Here's some tricks I would try...
1. Verify the monitor's power cord is plugged firmly into the wall outlet and the back of the monitor.
2. Verify the monitor cable is firmly connected to the computer and the monitor.
3. Verify that you have turned the monitor power switch on.
4. If the power light on the monitor is not on, test the wall outlet (plug in a light or something you know works).
5. If the power light on the monitor is not on, try a different power cord.
6. If the power light is on and yellow or orange or flashing, but nothing displays, or the display is incorrect, borrow a monitor from a friend. If that works, your monitor probably needs replaced.
7. Also, you could try your display on a friend's computer. If it doesn't work, your monitor probably needs replaced. If it works properly on your friends computer, the problem may be with your computers video output port, motherboard video chip (or video card, if you have one), or drivers.

Good luck.

The problem is in the power supply board, there are one or more capacitors that open, causing the power to stop. Sometimes they will bulge at the top making it easier to spot.

is your lcd in english? what do you mean you ccant find indonesia on the menu? are you looking for the language or the indonesian channel? well if your looking for the language you should go the settings menu and go to language..from there try to find indonesia and enter,then the language will be indonesian..or if your wondering why you cant scan the channels on your lcd..you should try settings menu again and go to the channel set up..find auto scan and click it..then your lcd should be scanning and remembering all the channels thats been scanned,but before you do the scanning make sure that your antenna or your cable provider is connected to your tv..otherwise you wont scan anything

Sounds like you have some bad electrolytic capacitors.
If you are tech savvy, open up the unit and look for capacitors that have bulging tops or leaking electrolyte / bulging at the bottom and replace any/all that look like this.
In most cases, this will fix you right up quick.
It's the right age for this to be the most likely issue.
The capacitors will be near the power input and the inverter stages of the circuitry.

what system is it connected to laptop or desktop? if a laptop try using the Fn+ Monitor buttton ...it may be in a different mode .. if desktop try another monitor if it works then the issue is something else or if it still does not work then it could be a loose video card try reseating the Video card

make sure that all the cables are connected FULLY.
blinking light means that there is no signal.

The monitor requires service The monitor is not receiving a signal from the computer

Factory Setting & EEPROM Initialization Method
Factory Setting Method
- Connect the signal cable and power cable to the LCD monitor.
- Press Power switch with pressed MENU key.(Menu key + Power key).
- Then, a User can change the factory setting value in OSD menu.
- Save changed value and Turn off the power s/w.
- Turn on the power, adjust the screen.

Sounds like the monitor power supply may be faulty or noisy - most probable cause is that it needs the capacitors changing. If it has an external supply try changing it as that is a cheap fix worth a gamble - if power is internal then change the monitor.