HeadUnit Broken, won´t start

Hi, I have a massive problem with my unit. I tried to install Malaysks newest room on my KYD with 1024 * 600 RK 3066, but it didn´t work. I think it didn't even flash or anything, but now the radio wont start. The screen of the radio stays black and all the Button lights are on. The button lights stay on even if I take my car keys out and wont even turn off after some hours. I tried all known ways to enter recovery but there was no sound or screen shown and also i unplugged the radio but didn´t work. Is there a possibility to safe this unit? :(

Please help me & thank you

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