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General Category => Repair logs => Topic started by: tim on November 20, 2005, 05:16:04 PM



Title: Monster Zero
Post by: tim on November 20, 2005, 05:16:04 PM
Symptom
Different bad things happen each time you power on. Sometimes you get a screen full of static garbage. Sometimes the game boots but with spurts of super fast speed and corrupt sprites.

Tests
Plugged in a Z80 ICE. The LED for "No Clock" is lit. Hey, yeah, those symptoms do sound like a f'd-up clock.

Fix
Pulled a crystal of the same speed off some board from the junk bin and replaced XTAL. Game boots and plays fine.