Spent the day at Khon Kaen immigration from 830 to 3 and successfully got my under consideration stamp (US embassy letter)...power went out midday too. This office is usually pretty empty so I can't even imagine how other offices must be. Good luck everyone!
TLDR : Answer Summary
The user reports spending an entire day at Khon Kaen immigration successfully obtaining their under consideration stamp, which required a letter from the US embassy. Despite a midday power outage, they noted the office is usually empty and wished good luck to others navigating similar processes.