If the player spins but won't read, the laser lens is likely dusty. Gently wipe it with a Q-tip dipped in 90% isopropyl alcohol .
Some players "freeze." Unplug the power, remove the battery if possible, and hold the Power button for 30 seconds. Some models have a tiny RESET pinhole on the side or back. Portable Dvd Player Repair Manual
If the disc isn't spinning, the motor might be dry. A tiny drop of electronic-safe lubricant (like white lithium grease) on the motor spindle can sometimes revive it. If the player spins but won't read, the
If the laser isn't moving, it can't find the start of the disc. With the power off, use a plastic tool (like a spudger) to gently nudge the laser assembly back and forth along its metal track. Some models have a tiny RESET pinhole on the side or back