RECOMMENDATION IS FOR HP TO ANNOUNCE A PRODUCT RECALL.
I have checked the HP support forum(UK). 20 users of cdwriters complain of unreliable units(7100, 7200 9xxx). Sudden and unexplained appearance of "Trackwriter" errors where units stop writing. Reading is not a problem. Units are lightly used. HP support does not respond - will not fix problem or replace unit unless within warranty. Only solution is to trash the units some of which are just out of warranty. Sounds like a design or mfg defect to me.
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larryrsi2