Start/pause button not working, is it the control panel or the control electronics board?

E90 is family error code visible to the customers. It is necessary to read the error in the service mode so please proceed with the following procedure for rapid reading of alarm codes:
Press and hold down START/PAUSE and the option button nearest to the START/PAUSE button for at least two seconds!
After that the display will show one of the following errors that are more precise:
E91, E92 - Communication incongruence between main board and display board (versions not compatible). Posible causes: wirings, main board or control/disply board.
E93 - Incorrect configuration of appliance. Posible causes: Incorrect configuration data; electronic board faulty.
E94 - Incorrect configuration of washing cycle.
Posible causes: Incorrect configuration data; electronic board faulty.
E95 - Communication error between microprocessor and
EEPROM. Posible causes: Electronic board faulty.
E97 - Incongruence between programme selector and
cycle configuration. Posible causes: Faulty electronic board (Wrong configuration data).
Considering that this is a complicated fault, my advice is to contact an authorized service center.They have special equipment such as an interface that allows them to upgrade software in your appliance. If you are not doing anything on the appliance before the failure, the only thing you can check is the contacts between wiring and electronics.

Dado

E90 is family error code visible to the customers. It is necessary to read the error in the service mode so please proceed with the following procedure for rapid reading of alarm codes:
Press and hold down START/PAUSE and the option button nearest to the START/PAUSE button for at least two seconds!
After that the display will show one of the following errors that are more precise:
E91, E92 - Communication incongruence between main board and display board (versions not compatible). Posible causes: wirings, main board or control/disply board.
E93 - Incorrect configuration of appliance. Posible causes: Incorrect configuration data; electronic board faulty.
E94 - Incorrect configuration of washing cycle.
Posible causes: Incorrect configuration data; electronic board faulty.
E95 - Communication error between microprocessor and
EEPROM. Posible causes: Electronic board faulty.
E97 - Incongruence between programme selector and
cycle configuration. Posible causes: Faulty electronic board (Wrong configuration data).
Considering that this is a complicated fault, my advice is to contact an authorized service center.They have special equipment such as an interface that allows them to upgrade software in your appliance. If you are not doing anything on the appliance before the failure, the only thing you can check is the contacts between wiring and electronics.

Dado

Error CodeConditionCheck/RepairShop PartsClean light blinks 7 timesHeater circuit failure. Control didn't detect the expected rise in water temperature.Check the heating element and related components (wiring and control board) in that circuit.
Heating element, Electronic control board, Thermistor, Circuit wiring
Console light blinks rapidlyThe control detects a stuck button on the control panel.A failed control panel or a malfunctioning electronic control board can cause this code. Check the buttons on the control panel using a volt/ohm meter. In most cases, the control panel must be replaced. If that doesn't solve the problem, the electronic control board might be at fault.
Control panel, Electronic control board
Start/Resume light blinks slowlyIf the dishwasher door is opened or power is interrupted during the cycle, the dishwasher won't start again until the door is detected as closed and the Start/Resume button is pressed.Check the door latch and switch assembly. A failure in the Start/Resume button also can cause this problem.
Door switch assembly, Control panel, Electronic control board
Clean light stays onThe dishwasher won't start a new cycle unless it detects that the door opened after the previous cycle.Turn off power to the dishwasher by shutting off the breaker and restarting. If that does not work, the door switch assembly is stuck and must be replaced.
Door switch assembly
Control lock LED is on but not accepting key pressesAccidentally turned on or control detected keypad problem.Press the Heated Dry key for 5 seconds to turn off control lock feature. If that doesn't work, replace keypad.
Keypad
Sanitized LED blinks at end of cycleControl couldn't confirm that the dishes were sanitized.Check voltage to the dishwasher and the temperature of incoming water. Check the diverter motor, the heater and the OWI/thermistor.
Diverter motor, Heater, Thermistor

E90 is family error code visible to the customers. It is necessary to read the error in the service mode so please proceed with the following procedure for rapid reading of alarm codes:
Press and hold down START/PAUSE and the option button nearest to the START/PAUSE button for at least two seconds!
After that the display will show one of the following errors that are more precise:
E91, E92 - Communication incongruence between main board and display board (versions not compatible). Posible causes: wirings, main board or control/disply board.
E93 - Incorrect configuration of appliance. Posible causes: Incorrect configuration data; electronic board faulty.
E94 - Incorrect configuration of washing cycle.
Posible causes: Incorrect configuration data; electronic board faulty.
E95 - Communication error between microprocessor and
EEPROM. Posible causes: Electronic board faulty.
E97 - Incongruence between programme selector and
cycle configuration. Posible causes: Faulty electronic board (Wrong configuration data).
Considering that this is a complicated fault, my advice is to contact an authorized service center.They have special equipment such as an interface that allows them to upgrade software in your appliance. If you are not doing anything on the appliance before the failure, the only thing you can check is the contacts between wiring and electronics.

Dado

Problem maybe that the START/PAUSE button has broken loose from the control panel. All the buttons are attached to control panel and "hinged" so when you press the button, the button presses a small button switch on the display control. You may have to order
the Control Panel.. Disassembly is required to inspect.
It would be least likely that the Display PCB is bad..

You have a bad control board , the part is called the user interface

Possible that the interruption could have reset the processor or memory. Allow the machine to be off power for a long time , even overnight. Press down all panel buttons and check if there is any moisture within the panel. IF so use a dryer to warm off.
Now connect the washer while holding the start/stop/pause button, If there is no display at all then check the main power to the board and also the sub-voltages within the board. If not it is possible that the board has failed.

F01 - There may be an internal problem with the control, attempt a Hard Reset.

Hard Reset - In some cases the control can be non-functioning or may not accept activation from the control panel. To clear and restart the control follow the these steps:

* Unplug or turn the circuit breaker off for 30 seconds.
* Reconnect the unit to the power source by turning the breaker back on or plugging the unit back into the wall outlet.
* Press the Pause/Cancel/Stop button twice to clear the "PF" in the display.
* Start a short cycle to check the operation of the machine by selecting a cycle and pressing and holding the start button until the machine starts.

The F01 generally indicates a failed electronic machine control board.
This error code can sometimes be caused by a glitch or power surge through the electrical lines.
You may be able to clear this code by unplugging the washer for 5 minutes.
If the code returns after plugging the washer back in, then the electronic machine control board will need to be replaced.

The procedure for accessing and replacing this control board is shown in this image...

http://media.fotki.com/1_p,wkwdftgtbkdgfrwxgtqsskgwtqkq,vi/ksrttqdqrxkssrqtgsd/1/1303472/5961857/image12917img-or.jpg

Be sure to unplug the washer before accessing internal components.
When you access the control board, I recommend transferring the wires from the old control board to the new replacement control board one connection at a time.
Once you have all of the wires transferred, remove the old control board and mount the new control board in the washer.
Reassemble and test the washer.

The "F01" error code indicates a communication error between the Central Control Unit (CCU) and the EEPROM onboard the CCU.
The "F01" can also be displayed if the onboard "Pump Driver" fails to activate.
Generally in order to correct this failure will require replacing the CCU.
There is no way to test and verify if the control board has failed.
The technical data sheet basically states to replace the CCU.

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I had this problem with another model LG washer dryer and the problem was just the tiny switch (6mm x 6mm) on the circuit board had worn out. They cost about 30 pence on eBay and are very easy to remove and re-solder onto the circuit board as there are only 2 pins. This saved a huge amount of money for a new control board.

Is the door firmly closed? Open the door and close it firmly. If the pause button is really stuck, you will need to repair/replace the board.