I have a little used Yamaha DVD-S2500 (actually a chinese Philips clone). This expensive player has well known problems with playing certain types of disc eg DVD-R & SACDs. I contacted Yamaha support recently as the inability to play some SACDs at all or intermittently was driving me nuts ! The player played all other discs OK & was running V58 firmware. They provided me with a V59 firmware download & suggested I try it to see if it helped; good service I thought. However, having followed the supplied instructions to the letter, the firmware update failed to complete & the player's firmware is now completely corrupt; the player now being completely dead ! Yamaha will not help & suggest that I take it to a service centre & pay for repair. It would seem that it is not possible to re-flash the flash memory (surely that is the whole point of flash memory ?). There is no RS232 port to connect a utility for re-flashing either ! I asked if they could provide me with an exchange board (SD5.2 MONO board) - it is not under warranty. Yamaha said no, but I could purchase one for an eyewatering £496 from Charles Hyde if I wished to try fitting it myself (a 10 minute job) ! I wish I had not had faith in Yamaha support. I have done nothing wrong & now have a u/s player. Perhaps this is one for Watchdog. Anyways you have been warned.