We have a thread where you can get beat up for your retro gamer tattoo if you want, or just for you to generally self-deprecate and express regret for it as a cautionary example but yes if it's black lines, you can GENTLY run a soldering iron across the convection to fix the loose ones. Watch a few tutorials closely first.
Sadly, Game Gears all have the kind of electrolytic capacitors that are due to fail any time so their displays are getting progressively more washed out without being the caps being replaced