Narrative:

During the day; had the craft svced at local ZZZ service center. Prepared to leave just before XA00 pm local time. As usual; in the pilot's lounge; connected on internet to get the WX for ZZZ and the trip to ZZZ1. Then picked up ATIS/ASOS from cell phone prior to going to the plane; the recorded message said that the tower was closed; the airspace was changed from D to G and the tower would reopen in the morning. It was a very dark night. After the preflight; got on the radios to check ATIS; and there was nothing; it was all 'quiet.' made calls on CTAF to announce leaving transit; going to run-up. Then after checking traffic on mfd; it looked like all was clear; announced on CTAF from holding short to takeoff and departing left crosswind. (FYI at both ZZZ2 and ZZZ1 when tower is closed there is no ATIS WX.) switched to approach; called for VFR flight following and after a couple tries; noted that there was no response and no 'noise' on the radio. Tried a couple other frequency and realized I was 'no radio.' stopped trying and next started 'flying the plane.' there is a ridge to the west of the airport; so I focused on making sure I was going to clear it; after being distraction by the non-functioning radios. Lesson learned: it turns out the ASOS recording is false; the tower was open; I looked up at the tower during the run-up; saw the green/white light; but nothing else. After clearing the ridge; cleaned up the aircraft and started the troubleshooting; including recycling the radios. Turned out the service center had both radios 'on' but the volume turned full down. Since I own the aircraft; and am the only pilot; I missed this totally.

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Original NASA ASRS Text

Title: A SR22 PILOT DEPARTED FROM A TOWERED AIRPORT WITHOUT TAKEOFF CLEARANCE BECAUSE THE ATIS MESSAGE NOTING THE TOWER CLOSURE WAS INCORRECT AND HIS AIRCRAFT'S RADIO VOLUME WAS TURNED TOO LOW TO HEAR PRE-TAKEOFF RESPONSES TO CTAF AND TRACON AFTER DEPARTING.

Narrative: DURING THE DAY; HAD THE CRAFT SVCED AT LCL ZZZ SVC CTR. PREPARED TO LEAVE JUST BEFORE XA00 PM LCL TIME. AS USUAL; IN THE PLT'S LOUNGE; CONNECTED ON INTERNET TO GET THE WX FOR ZZZ AND THE TRIP TO ZZZ1. THEN PICKED UP ATIS/ASOS FROM CELL PHONE PRIOR TO GOING TO THE PLANE; THE RECORDED MESSAGE SAID THAT THE TWR WAS CLOSED; THE AIRSPACE WAS CHANGED FROM D TO G AND THE TWR WOULD REOPEN IN THE MORNING. IT WAS A VERY DARK NIGHT. AFTER THE PREFLT; GOT ON THE RADIOS TO CHK ATIS; AND THERE WAS NOTHING; IT WAS ALL 'QUIET.' MADE CALLS ON CTAF TO ANNOUNCE LEAVING TRANSIT; GOING TO RUN-UP. THEN AFTER CHKING TFC ON MFD; IT LOOKED LIKE ALL WAS CLR; ANNOUNCED ON CTAF FROM HOLDING SHORT TO TKOF AND DEPARTING L XWIND. (FYI AT BOTH ZZZ2 AND ZZZ1 WHEN TWR IS CLOSED THERE IS NO ATIS WX.) SWITCHED TO APCH; CALLED FOR VFR FLT FOLLOWING AND AFTER A COUPLE TRIES; NOTED THAT THERE WAS NO RESPONSE AND NO 'NOISE' ON THE RADIO. TRIED A COUPLE OTHER FREQ AND REALIZED I WAS 'NO RADIO.' STOPPED TRYING AND NEXT STARTED 'FLYING THE PLANE.' THERE IS A RIDGE TO THE W OF THE ARPT; SO I FOCUSED ON MAKING SURE I WAS GOING TO CLR IT; AFTER BEING DISTR BY THE NON-FUNCTIONING RADIOS. LESSON LEARNED: IT TURNS OUT THE ASOS RECORDING IS FALSE; THE TWR WAS OPEN; I LOOKED UP AT THE TWR DURING THE RUN-UP; SAW THE GREEN/WHITE LIGHT; BUT NOTHING ELSE. AFTER CLRING THE RIDGE; CLEANED UP THE ACFT AND STARTED THE TROUBLESHOOTING; INCLUDING RECYCLING THE RADIOS. TURNED OUT THE SVC CTR HAD BOTH RADIOS 'ON' BUT THE VOLUME TURNED FULL DOWN. SINCE I OWN THE ACFT; AND AM THE ONLY PLT; I MISSED THIS TOTALLY.

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.