LG Inverter Direct Drive dishwasher panel display has 3 illuminated dashes (---). Seems it has power, but won't start. Have waited an hour; dishwasher won't start and dashes won't go away.

More than likely the control pad is defective

When you open the door, it should be on the right side of the door.

Have you checked whether the filter screen under the bottom panel is not clogged with food and debris?

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Hi there,

An F1 usually means a communication error between the control board/touchpad and the motor/pump assy. Could you please supply the full model # for your unit?

Hi, try to reset the dishwasher power fuse. Check your dishwasher manual to do this.

see this causes and fix it. God bless you
Thermal Fuse If the dishwasher won't start the thermal fuse might have blown. The thermal fuse helps to prevent damage to the dishwasher by turning off power so that it doesn't overheat. Once blown, the thermal fuse will have to be replaced for the dishwasher to work.

Door Switch The door switch, or switches, are sometimes called interlock switches. The door switch prevents the dishwasher from running while the door is open. If the dishwasher won't start, the switch or switches might be defective. To access the door switches, remove the control panel or inside door panel - depending on the model. They can be tested for continuity.

Main Control Board The main control board provides power to nearly every component of the dishwasher. If the dishwasher won't start the main control board might be defective. YOU should first check for more common parts. Many times control boards are replaced unnecessarily because the problem was not diagnosed properly.

Touchpad and Control Panel If the touchpad is defective, the control board might not get the signal for the selections made. If the dishwasher won't start and the display doesn't seem to change properly when the buttons are pressed, the touchpad might need to be replaced. On some models the touchpad and control panel are sold together and will need to be replaced at the same time.

Touchpad If the touchpad is defective, the control board might not get the signal for the selections made. If the dishwasher won't start and the display doesn't seem to change properly when the buttons are pressed, the touchpad might need to be replaced.

Timer The timer allows power to flow to the proper parts at the proper times. If the dishwasher won't start, the timer might be defective. Keep in mind that timers are often misdiagnosed as the cause of a problem. Check other components first before replacing the timer.

Great question!
2H means 2 hours -- 120 minutes ... the display only has 2 digits so it can not display 120 minutes. When the timer gets done near an hour an one half, it will start to display a countdown somewhere near 90 (minutes)
Yes, the cycles are long on the LG LDFxxxx dishwashers, just like all water and energy conserving dishwashers.
This really is a good dishwasher, recommend you keep the rinse aid dispenser filled up and ALWAYS use a brand name powder (like Electrosol or Cascade.) Also make sure when it was installed, it was properly leveled.
Hope this helps!