The answer is no -- Dell does not repair monitors.  Neither will most repair shops.  The panels are not widely available, and beyond that, the panel is a very larger percentage of the cost of a monitor. Add in the fact that many monitors are not designed to be repaired (it's common for the panels to be fixed in place with strong adhesive) and they're replaced, not repaired. The warranty won't cover a cracked screen.  See if your personal insurance covers damaged property -- depending on the cost of the monitor and your deductible, it may or may not make sense to file a claim, but it's the only coverage you have for replacement.  
Hi, I have this monitor for about 4 months. I bought from Best Buy. I can’t find the receipt or anything. The screen cracked somehow? I didn’t drop or anything. Is there any way to fix it?
S3220DGF, Best Buy, no receipt, cracked