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Repairing a defective cluster

1
Hi all, i m trying to repair a broken cluster. Immediately after removed connectors, it loses all configurations and parameters, i thought about a broken backup battery on it. I only find this on its board

[Image: 20191228-101912.jpg]

Is this in red a backup battery?
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2
No, it is overvoltage protector.
Thanks given by: antok602 , pesona
3
Thank you, in this cluster i cant find any visible kind of battery on its surface. For this problem i think could be related to a broken battery on it, because when i remove tractor battery it loses memory. It oesn t lose it when i only do the key off. Do you think it needed to be a battery on it?
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