[Desire Q&A, Help & Troubleshooting] Concorad:
Hello everyone,

I am trying to understand what is the key fault of my HTC Desire. I since have changed to a HTC One X, due the fact that my Desire has lost both full phone networking and sound capabilities. The rest of the device works like a charm, currently with Paranoid's Jelly Bean rom, even on heavy load.

The phone has gone through three accidental falls (bad luck serie), that required me to change the amoled screen only three times up to now. The original digitizer is still like new. After the last fall, it started to develop some sound issues before the two ones I expose here. It started with the music only in one of the headset speakers thing (by compressing the left part of the phone, I could get back music in both ears).

Rapidly, I discovered my Desire could no longer catch the phone network, and so could no longer be used for calls, SMS or mobile Internet.

Additionally, no sound comes out from anywhere : front speaker, back loud speaker, headphone. The microphone appears muted as well. The volume settings are all at maximum, including using a more complete audio manager app from the Market. Headset detection plug/unplug works fine.

So apart from the other functionalities that all work (screen, digitizer, vibrator, Wi-Fi, Bluetooth, SDCard , Sim card (detected and activated), USB, heavy load from benchmarks and games, volume buttons, camera, etc...), the phone is rendered useless by not being able to catch phone networks and not produce any kind of sound.

I have replaced some parts of the phone since this issue has begun : the upper board with flex cable (that was tired) and the loud speaker (was tired as well). It has not solved these issues (it only solved appearing detection issues due to the tired flex cable and failing volume buttons).

I now use the Z-device test app to try to diagnose the issue. I am not sure I understand them, but they may give hints :

- He is detects the SIM card well and displays its information.

- He detects the phone as gsm type, but is unable to display the gsm cell id (blank space). He finds the device id (long number) and the software version (00).

- Data state is therefore set to disconnected.

- Multemedia chip is undetected (blank space)

- ALSA version is undetected (blank space)

- SCO for off-call use is set to true

- Microphone is set to muted

- Speaker phone and wired headset are, whatever happens, always set to false.

This is it. I haven't got further yet. I try to situate the possible hardware fault, since full wipe and reflash has not solved the issue. I only have those suspects :

- What is called the Wi-Fi cable, that is damaged (the thin cable can come out easily from one of it's metal end, while it is clipped properly).

- What is called the antenna cover (that looks like yet another plastic piece, with two metal pins on the left side), the cover being slighly cracked on the right side but still completely screwable.

- One of the motherboard's IC chips or component for an unknown reason.

The phone is in good state and works well now, aside of these two key features. It does not look like it has fallen down once, a shame. What is your opinion on this? Do you have ideas or suspicions?

I thank you by advance.