Just reposting my rec from the Aggieland board.
Seems every spring this type of thread comes up. I just wanted to go ahead and give a recommendation for Larry at Rain Tec,
https://www.raintecirrigationsystems.com/ I've used him several times now and always pleased with him and his crew. He's honest and doesn't upsell you things you don't need. He and his crew work quickly and do great work. All at an affordable price. Had him out yesterday for what I thought was a leak. He found 3 valve boxes that I didn't even know were there and was able to fix a leak in about 30 seconds without digging anything up or replacing any valves or anything. Then went around and checked all the other zones and made some adjustments on them as well. Can't recommend him high enough for anyone testing out their sprinklers and noticing any issues.