Hello, just got a new used iPod classic 5.5 gen and I found that after it goes into the deep sleep mode I cannot wake it by pressing any buttons. The click wheel works fine but just won’t wake it from deep sleep. If I plug it in it wakes up right away. I should also mention this happens at full battery too so it’s not bc the battery is too low. Any idea what could be going wrong here? The seller I bought it from supposedly put in a new battery and click wheel, maybe something there is wrong?