I also have a 3540a that died while burning; also will not read pressed or burned CD/CDRs; DVDs it reads A-OK. Tried a lot of fixes; lens cleaning, blowing away the drive and letting XP refind it on reboot, uninstalling the IDE channels, uninstalling the filters (per chef, thanks for the link!), etc. Uninstalled all burning software (Roxio and Nero) but nothing there. Thought it might be a OS problem, but was a little leery of burning down the house and re-installing XP. Tried plugging in an older HP burner, no problems with that. Don't have a 2nd system to try the drive on, but I might try bringing it in to the work computer.... luckily Newegg has a decent RMA policy, but wonder if I might have ended up with someone else's RMA'd drive. Anyways, thanks for all of the suggestions, across the threads!