Maybe you have a bad dock charging connector?? Is the charging cable loose when it is inserted in to the dock Has you do not want take apart the iPad ?/ bu what you are saying you will have to The Thristar tester would give you a good idea what is faulty but not 100% full proof Link https://www.repairsuniverse.com/products...-tristar-tester
Look for caps missing around the display commectors There is a few signals in that area that sends and receive messages from the battery They are knock off during removal or replacing the screen
Check your ram to see if they are seated correctly or one may be faulty You have 2 slots Remove one at a time Beeps codes https://support.lenovo.com/ie/en/solutio...
Check your ram to see if they are seated correctly or one may be faulty You have 2 slots Remove one at a time Beeps codes https://support.lenovo.com/ie/en/solutio...