My ps 3 reads a dvd disk but not my games why?

When your console does not read any disk, that is usually because of a problem with the optical laser lens that is dirty, faulty or opaque, and will start operating on certain disks better than others.

In that case you will hear disk spinning, whirring and clicking, but the TOC (table of content track at start of CD/DVD will not be read, therefore the error.

Whe this problem is starting you may be able to read only few CD, DVD. After more prolonged usage , often the PS start losing the rest of functions, and ends up not reading anything at all.

If instead there is no noise, and disk does not spin at all , then there is a faulty motor, or the motor micro-switch is bad. This situation is far less common than the lens problem.

Try first using a CD/DVD cleaner disk to clean the lens. If that does not work you will need to disassemble the PS, and clean lens directly with q tips and isopropyl alcohol, or to replace the CD/DVD lens, or the whole drive unit.

before doing tis, contact Sony to check if the unit can be replaced or repaired by Sony, you find the number on the Console documentation.

Things work in the same way on Xbox, Just contact Microsoft instead than Sony.