[Q] Proximity Sensor and compass, both not working any more

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http://forum.xda-developers.com – As title says: since i rooted my desire hd and flashed a custom rom, the proximity sensor ( G-sensor) and compass aren't working anymore. Tried to calibrate, reset, hard reset, flashed other roms, nothing helped. While calibrating, nothing moved, not the levelers and not the needle of the compass. What relation do they have together? Is it one part? Could it be a hardware problem or just software? I noticed some threads about a locked G-sensor. Tried to "shake" them loose. No result. Who can and is willing to help me? thnx. (HowTos)