[HTC One X] innitgrand:
So, I have a problem with my screen. The main question to keep in mind: is it a hardware problem or a software problem that I created myself and can therefore fix? I'll try to break it down for clarity:

Problem

screen sometimes doesn't turn on and can freeze during screen operations. If the screen freezes it gets horizontal lines and looks like it crams 5 frames vertically into the screen. Something (but worse) like this: en.community.dell. com/resized-image.ashx/__size/550x0/__key/CommunityServer.Discussions.Components.Files/3519/5228.IMG_5F00_3551-_2800_Large_29002D00_1.JPG (remove space between dell. and com)

It mainly goes haywire when it does large opperations and when I do stuff like flash a new boot.img. It does this in the ROM, recovery and bootloader (though only in the ROM can it be solved without restarting the phone). If it goes haywire I can still control the software behind it without the touchscreen with the volume buttons.

Background

I sent my phone to HTC for repair for WiFi problems. I had it rooted before and with a custom rom but never had any problems. When I got it back it had the most recent stock ROM from HTC (3.18.401.1) and was locked again. I tried to root it straight away and when I first tried to flash a custom boot.img (from the ViperX ROM 3.18), it started giving problems. I found that I couldn't access the new TWRP 2.4.4 recovery with touch (touch did not work). What did work is the TWRP 2.4.0-JB which has it's own touchscreen modules built in. I have flashed a lot of kernels, recoveries and ROMs but still the problem persists.

Tried approaches

Other boot.img (ViperX) with ViperX ROM: no working touchscreen, screen problems untested

Stock boot.img (3.18) with ViperX ROM: working touchscreen, not working radio, screen problems persist.

Stock boot.img with stock ROM (3.18): everything works except screen problems persist.

all aproaches done with a custom recovery (TWRP or CWM)

Failed aproaches

RUU because none found for 3.18.401.1 (highest was 3.14)

No nandroid backup for 3.14 on CID HTC E11

Nandroid backup of 2.17 failed because of HBoot version(I think), it didn't get farther than the HTC One X screen.

Downgrading firmware not allowed because too high version-main with fastboot lock, fastboot oem rebootRUU, fastboot flash zip firmware.zip. (most recent failed approach)

General information

current main version: 3.18.401.1

CID: HTC__E11

HBoot version: 3.19.00000

Current recovery: CWM

Current situation

Phone screen not working at all.

I have a 2.17 ICS ROM, CWM recovery, 3.14 boot.img.

I'm trying to get into a recovery screen to flash 3.14 stock ROM and then the 3.14 recovery to be able to use the RUU.

I have a CWM backup of a working 3.18 setup (boot.img, ROM and recovery)

The problem seems to be in the hardware or the firmware (as those are the only ones I didn't replace)

Requests

A 3.18 RUU

A nandroid 3.14 E11 backup

A suggestion as to the real problem (hardware or software)

[solved] A way to access fastboot -> push power when fastboot devices displays ??????????? and you get through to fastboot (still with no screen it seems)

A way to flash a ROM without recovery

A way to downgrade the version-main (is this in the ROM, boot.img or firmware?)

A new HTC One X :p

I know how to use ADB, fastboot and have some general knowledge of how the phone works.