Sorry to bother anyone here about this, But I have an error code Post 16/64 when I run the Apple Hardware Test CD(ver.1.2.3). It gives this error immediately. I go to the system information, and shows no 1 MB L3 cache(only 256mb of L2). On TechTool Pro it dosent show up either. The energy saver is set to highest performance, and in OS 9.2.2, I get a message immediately on startup "the built-in memory test has detected a problem with the cache memory. Please consult a service technician for assistance". The powerbook seems to be running okay, but I was curious if there was some way of accidentally or deliberately(other than the energy saver function) turning this L3 cache on or of somehow(maybe a firmware issue etc.), or have I got a real logic board problem? The unit had been serviced by apple in 2003 for a dead LCD display. Any help here would be surely appreciated. Thank You.