Loop in startscreen

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My hd2 loops in startscreen, htc appears, then the rom and radioinformation down left and then it restarts and again and again, but only with synccable, with only battery it is dead. Nothing happens.

Now i´m able do get the bootloaderscreen (rgb and white) and usb-connection and flash everything I want, with the same result as above.
I flashed stock rom, originally o2-rom, radio-rom only a.s.o., same result, htc-screen with radio and thats it, restart.

Is there anything i can try before sending it back to htc?

The bootscreen says:

PB81100 HX-BC
SPL-1.42.HSPL XE
0x05
CotullaHSPL 0x30

so HSPL is installed, and usb connection works.

The explanation why i got this problem depends on voice command, i´ll tried to change some files, because the speech was too fast to heare it.

Is there anything that i can flash, thats really helps?

The next problem is, that i can´t boot the orinal rom from sd-card, because without cable nothing happens, and with cable thres is only usb to flash.

Nobody there with some instruments that may be only technicans use? Clean the complete ram and rom and what else is there? Or is it a real hardwareroblem that can´t be fixed?

if you have hspl you could flash a ROM using customRUU from the bootloader i think. Have you tried a hardreset (hold volume up and down and reset button)? i had the same problem but for me switching the phone off for a few hours (i didn't have access to a pc) it booted up and i flashed a stock ROM. its a bad rom flash thats the problem. once and if you can get it booted be sure to follow the instructions on the mtty thread or flash a stock ROM before each and every custom one.

EDIT : Haven't read it properly. seems worse than my problem. simple thing are you battery contacts good and making a proper connection? Only other thing i can think.

Originally Posted by netfan55

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Now i´m able do get the bootloaderscreen (rgb and white) and usb-connection
...
The bootscreen says:

PB81100 HX-BC
SPL-1.42.HSPL XE
0x05
CotullaHSPL 0x30

so HSPL is installed, and usb connection works.

Try MTTY with your device.

is a battery problem?

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excuse for my poor english....

I think that if you can not flash your HTC HD2, I think the problem is in the battery.
If the battery is discharged below 50% you are not allowed to flash.
Instead if you start flashing when the battery is above 50% but during the operation the battery falls below this threshold, the flashing operation stops generating an error (usually error 220). This is due to the fact that the device is not recharged during the upgrade radio.

with best regards, paperinapap