Model numbers LS27D590 LS27D590P S27D590P
Got this monitor in which didn’t turn on. It uses an external AC power supply as most LED monitors. The TV has only one main board inside and I was able to find a used on on ebay. Part number BN94-07215A.
When the replacement arrived, the monitor behaved exactly the same and didn’t turn on. I then noticed the connector to the LED backlight had broken off and was not making contact to the edge lit strip. I disassembled the panel down to the strip but improperly mounted the connector back and overworked the solder pads. During testing, something shorted on the main board as well and I had burning component smell from it.
There is a small blue led in the bottom right corner and it can be configured to be on with the monitor on or in standby. If you don’t know the current setting, it can be confusing to determine if the monitor is on or off if the backlight doesn’t come on.
Since I had the second main board, I was able to find a replacement edge lit strip on Aliexpress.
Once installed, the monitor worked with everything put back together and I am able to upgrade from my reliable 22″ Samsung LED monitor. It would be nice to have a 1440p or 4K monitor since the 27″ just gives bigger pixels at 1920×1080 resolution.