Hi @dev0 ,
Here’s the service manual for the laptop, taken from this webpage.
Go to p.45 to view the necessary pre-requisite steps and then the procedure to remove/replace the touchpad. This should give good access to the buttons
If it cannot be fixed, search online for Dell 7569 touchpad button board - example only to get results for suppliers. The example was shown only to give you an idea of the cost of the part. There are other suppliers that may suit you better.
If you had a USB or BT mouse lying around, you could connect it to the laptop and use that instead as an alternative workaround
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