Power board replacement for no cooling? - LG LFC23760ST Side by Side Bottom Freezer French Door Refrigerator

Based on the information provided, it seems that the Norcold N611R fridge in the travel trailer is experiencing issues with cooling on AC power. The green and yellow LEDs are blinking, and the fridge stops cooling after running for a random number of hours. The gas cooling seems to be working fine, and the fuses, AC/DC power, and power board have been checked and replaced.

One possible cause of this issue could be a faulty heating element. To check if the heater is working properly, you can use a multimeter to measure the resistance of the heater. The resistance should be between 44 and 52 ohms. If the resistance is outside of this range, then the heater may need to be replaced.

Another possible cause of this issue could be a problem with the thermostat or temperature control system. If the temperature control system is not functioning properly, then it may not be able to maintain a consistent temperature in the fridge, which could cause it to stop cooling after a certain amount of time.

It is also possible that there is an issue with the wiring or connections in the fridge. If there is a loose or damaged wire or connection, then this could cause intermittent cooling issues.

In order to diagnose and fix this issue, it may be necessary to consult with a professional technician who has experience working with Norcold fridges.

Maybe need to replace dispenser panel board.

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.

That power surge probably burnt out the guse on the circuit board. I suspect you may need a new board unless you know an electricity geek who can replace the fuse. New I would check your warranty. That circuit board might cost $200. plus..

or maybe just your thermostat

With volt-ohm meter (vom) check for 24v input power. Most output voltage will be 5v DC, check for that. If the relays are soldered on to the board, your only solution is to replace the board. A "ticking" sound may be a bad relay. One check you can make is to disconnect any incoming power to the unit and remove the board. Inspect the soldered side of the board, if you see any black or brown spots, most likely the board is bad and will need to be replaced.

If the lights are on/blinking, that usually means that the control board is OK, and it's the power supply that is not providing sufficient power for the cooling element to operate. This is a common issue with the Krups VB 5020 series.

Hi this error code is an issue with paper source option vertical transport cooling fan motor or the control board check and replace motor if it dose not resolve the issue change the control board If you check vertical transport cooling fan motor rotation the voltage across pj14a-3 on power supply board and ground is dc0v after malfunction os reset
if yes change control board if no check cooling fan motor and replace it

hi. the cooling assembly has failed to cool the power board. this has allowed this board to become extremely hot, therefore, burning up the circuits on this particular board. replacing this power board and repairing the cooling assembly and fan, will fix the unit.

If this is an HCN4226 open the back and locate the convergence board - it's up and to the left mounted on the frame rail. Unplug the power to it, the board is marked with a +/-20v symbol. Now plug the unit back in and try to power it up. If it comes up and has good sound that convergence board board needs to be repaired. The amps on it need to be replaced and both the return and line resistors have to be tested and replaced as needed. Some shops, ours included, have started offering cooling packages to help prevent this circuit from overheating by mounting a cooling fan directly in front of the amp board. It's an inexpensive measure to help cool that circuit.
Bill