No HDMI output on BIOS and post

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   Hi people.In my company we are using the following hardware combination: a Asrock motherboard model IMB-150 and a LG tv model 43LH541V-ZD. Everything worked ok until we buy a new batch of TV's identical but with a newer firmware version. With this new combination in approximately 50% of the tests I made I cannot see the display when booting or when I enter BIOS (pressing key without seeing anything).
I have tried a faulty board with other TV's or the older TV model and I have no problem.
I asked LG to try to downgrade the TV firmware but the support guys told me this is impossible...
I have tried a lot of BIOS combinations with the same luck.
Does anybody know a solution or any new test a should do?
Thanks.

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smi2000 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 05 Jan 2017 Status: Offline Points: 3	Post Options Post Reply Quote smi2000 Report Post Thanks(0) Quote Reply Topic: No HDMI output on BIOS and post Posted: 05 Jan 2017 at 1:31am
	Hi people. In my company we are using the following hardware combination: a Asrock motherboard model IMB-150 and a LG tv model 43LH541V-ZD. Everything worked ok until we buy a new batch of TV's identical but with a newer firmware version. With this new combination in approximately 50% of the tests I made I cannot see the display when booting or when I enter BIOS (pressing key without seeing anything). I have tried a faulty board with other TV's or the older TV model and I have no problem. I asked LG to try to downgrade the TV firmware but the support guys told me this is impossible... I have tried a lot of BIOS combinations with the same luck. Does anybody know a solution or any new test a should do? Thanks.