[QUOTE=Ibex;2784360]If they are exactly the same part number then it should be OK. (Have you tried cleaning the lens on the old OPU carefully with isopropyl alcohol?)
But be aware that optical drives contain unique calibration information in their EEPROM, so after changing the OPU your drive will no longer be correctly calibrated.
Hopefully it won’t make much difference (I’ve exchanged OPUs on a couple of PX716s without any problems), but often it can cause severe writing problems. If that is the case try using Solidburn (set to on for known media), which is very good at creating its own write strategy.[/QUOTE]
The same part number means that they are identical?
Yes i have but it didn’t help.
I thought the EEPROM is stored in the firmware and it should not make any difference if i use a OPU of the same model.