Unable to upgrade firmware

Hi !! I am Jagan from Singapore. I own X-m1 Camera.

2 months before i have problem with Shutter button and unable to click the shoot. I reached service center for support. However, Fujifilm SC denies the service as support is closed 2 years before.

I reached local repair shop. He told moisture contents inside and board need to get replaced. After changing the board, camera asking for firmware upgrade. But, unable to upgrade the firmware as Ok button is not responsible.

Later, he put back the old board and camera prompt for firmware upgrade. Repair says Ok button board got spoiled and need to replace..

Any support ? I really love that camera and holding for more than 10 years