Error Code IO
Control board IO expander chip is not working
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: IO LED blinks
What This Means
IO expander chip failure; Soldering defect on main PCB; Short circuit on PCB; Main board PCB failure
What actually causes this:
Main board chip failure or manufacturing defect
First Thing to Check
Unplug and inspect main PCB visually for burn marks or corrosion
Parts Involved
How to Fix
- 1
1. Visual inspection of main PCB around IO expander
- 2
2. Check for cold solder joints or corrosion
- 3
3. Check for short circuits on PCB
- 4
4. Use multimeter to test chip power pins
This Error Applies To
Samsung RF22R7351 Series Refrigerators (2010) (2010–present)
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