I don't understand how you could check integrity of hardware wallet by pocking and opening it like that if you are not some repair expert, and you clearly are not one.
Better don't waste your money ordering new ledger and get some other open source wallet, or if you decide to order than don't use your real name, address and main phone number or your data will probably be exposed in some new leak.
I followed the instructions on this page.
https://support.ledger.com/hc/en-us/articles/115005321449-Check-hardware-integrityIt turns out mine was a revision 6 and markings on the chip matched when i compared it to mine. I've been using electrum without any problems but decided to get a hardware wallet for extra security. I'm aware of the Ledger leak and I will either get a Trezor or if I decide to get a Ledger I will take the precautions you mentioned. Thank you.