Pokemon Silver clock refuses to change - NOT THE BATTERY

[/gameboy]

Hey y'all, new to the sub but not new to the dmg life. I've been repairing my dad's old dmg and added a backlight to the original screen. Long story short, I've been playing the original Silver for years now. I finally got the DMG ready to play , and excitedly plugged Pokemon into it to test out the new backlight. Everything works great, my save from two years ago was even still on there. Played for a bit, then saved. I turned it back on the next day to discover the clock hasn't advanced at all. No problem, I thought. 99.999% of the time, it's the battery getting ready to die. Well, I put the game in the DMG, changed the battery, and still nothing. I changed the battery for a second time, soldering the contacts each time. I tested the legs on the board of the game cart to verify they're getting 5v, which they are. It's a CR2025 model game. I've just replaced and re-soldered the crystal oscillator, and that has changed nothing. What's the next step??
TL;DR my Pokemon Silver game refuses to advance the clock even though I've replaced the battery twice with solder and replaced the crystal oscillator. What's next?

submitted by /u/Jennys_Got_A_Gun
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