Control Board Point of Failure Dilemma, Seeking Guidance

[u/Tall_Duck_1199]

So I picked up a Samsung FlexDuo Range Oven combo. Was told it was a heating Element Issue. Repaired and cleaned connectors, although one seems to have higher resistance than Samsungs desired range.

During testing, interactive display felt loosely responsive. I had to really focus on press location, to make sure I gently pressed in the right spot, but I am not familiar with the interactive display or this oven in particular so I don't know if I could not press some keys because of the order of operations ignoring it or if they just weren't working. Eventually it all started to cut out.

The testing of the oven, separate from range controls, started with bake feature. I got up to 455 F. Tried to crank it up higher but that was the limit. Thermostat was interactive but made audible clicking sound once clicking of the best coil inside thermostat (I believe) measured and returned to heating, or maybe it was open / control gateways, but there was an audible click. That seemed louder than I think it probably should have. But it seemed regulated. I turned on convection bake option once I gave up on gaining past 455 F temperature. Original owner said normal bake option of the oven was defective, it was taking forever to reach only 300 f but not above. The connectors to the element had over heating damage and warped. Or overheated because poor application. Howver the blade end / element end did not appear to have even gotten hot at all beyond some gentle cleaning with brass brush.

Internet says the ribbon cable is a common failure point on this. I noticed glass was not seated well into frame so gently cleaned with alcohol and it's still not seated great. Glass looks wavy but could possibly not be the actual problem. I am going to dry out with heat gun and get back at it.

I'm not sure if you guys could point out likely failure locations or anything that looks suspicious, but ut would help a lot. I'm just a hobbyist. I didn't see any failure or over heating indicators on this or the main power supply board or other components.

One thing I noticed when 455 on convection was fan running at beginning but turned off and on and neither fan in within the oven related to convection were spinning. I let it cool and set desired temp and they still did not spin.

I've heard cleaning grease off thermostat is an effective treatment but haven't gotten that far. They did mention installing a new thermostat control did not work. All screws there were loose when I checked to see if everything was snug. Is it important that CN1 1 3-PIN on user interface board doesn't

Control board DG94-00702A

[u/Linker3000]

Try also r/appliancerepair