Thank you @wutske for your prompt response to my thread. I did replaced the bios chips with another R4E chips that had the latest bios. My first thought was of the lose connection but i do not have any extended practical knowledge for these types of diagnostics / troubleshooting.
The reason to take matters into my hands is due to the fact that the repairer in our country are not strict professionals and mostly end up ruining the hardware to a non repairable state.
I have other hardware as well with issues. The most of them are due presence of humidity in the surroundings.