8800 QQQ ICP-MS Q1 failure

Hi All, we have an 8800 QQQ that is about 6 years old, and recently had the Q1 fail - the error messages were +600 and -720 power supply voltages too low and I/O board malfunction. Consequently Q1 does not scan and no signal can be measured. Has anyone else had this problem with Q1 that really appeared overnight without any previous warning, and were you able to resolve this without replacing any parts? The service advice is to replace all 3 Q1 PCA boards - not a cheap!

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