Screen black only during boot, after replacing broken AMOLED display

[Guest ndesire]

Hi Everybody,

somthing very strange happend to me. I hope you can help me.

After I broke my AMOLED Screen, I replaced it with a new one.

(I ensured, that it is an AMOLED and NOT a SLCD).

After reassembling, everything seemed to workfine. The Desire boots

first with green HTC splash screen and then with my monster

boot animation from InsertCOIN.

But then, after second reboot the screen remains black.

I could feel the vibration, so the phone seemed to start

but no splash screen and no boot animation. When the boot is finished,

I can activate the screen by pressing the power button.

After that, phone works ok without any flaws.

However, when I reboot, same procedure again.

The screen remains black until the boot is finished.

OK, phone is working but it is annoying that I can't go into

HBOOT or Recovery mode. Actually I found a work

around by using Androidscreencast to go into recovery and

flash roms, but I'd like to do it from the phone direct without

casting the screen to my PC.

After some investigation I found an issue with probably wrong

display driver, but that's purely related to SLCD Desire. Anyway

I tried to flash the latest RUU and rerooted in order to see if it

makes any difference. But no change. I even tried to replug the

display connector to the main PCB in the phone. Nothing helps.

Now I hope the community has an idea.

By the way I had Bootloader 0.75 before reflashing RUU. Now it is 0.93. I'm currently running InsertCOIN 2.0 with A2SD. In the meantime I downgraded to boot loader 0,75 again.

Problem remains.

Thank you in advance for any useful hint beyond what I tried so far.

Cheers

NDesire