CRJ200 flight crew diverts for a display cooling problem but the Captain fails to enter the discrepancy in the aircraft log.

Narrative

Enroute we received a 'DISPLAY COOL' caution message. Ran the checklist which did not fix the issue and required landing at nearest suitable airport within 30 minutes. Planned on diverting to ZZZ; but company requested diverting to ZZZ1 instead. We had plenty of fuel and weather was just as good or better than ZZZ so we agreed to divert to ZZZ2 (we were 15 minutes from ZZZ2 at the time). Since we were a divert we parked at an unusual gate in ZZZ2. Once the aircraft was shut down a gate agent boarded and briefed the passengers and we proceeded to deplane. Once the passengers were off the airplane; the agent asked us if we could taxi the aircraft over to a different gate since they had another inbound. By this time we had our phones on and scheduling had already been calling. Scheduling informed me that we would be dead heading on a flight in approximately one hour and still needed me to operate a flight to ZZZ3 once I got back to ZZZ4. I told the agent that we would certainly taxi the aircraft over to the alternate location so long as we could do so in time for us to make our deadhead flight. At this time I proceeded to try to coordinate with the rampers to have somebody give us an engine start and wing walkers to leave the parking spot. Some minutes later they responded that they did not have the staff to do that so we just left the aircraft where it was parked. My crew and I began packing our belongings up to get off the airplane and to the gate in order to check in and make our deadhead flight. In the midst of all the confusion and trying to make sure we made our deadhead flight I forgot to write up the 'DISPLAY COOL' discrepancy in the log. I found out about forgetting to do so when I landed some hours later. I had a message from scheduling when I landed in ZZZ4 and when I called them back they put me in touch with Maintenance Control. They informed me that there was no write up in the log so I gave them a complete briefing as to what happened and they put the entry in the log. I have no excuse for not making the entry in the log; it should have been done. The only reason I can give in explanation is that the circumstances where unusual and with all that was going on I forgot. I would say that the one thing that threw me off the most was the immediate calls from scheduling trying to make sure we made it on that deadhead flight in an hour in order for me to operate another flight later. This combined with the other unusual factors; divert; unusual parking location; and attempting to reposition the aircraft are the only reasons I can give for forgetting to make the log entry.