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JVC GY-HM550U Fails (again…and again?)
I’ve been using multiple JVC cams for the last 17 yrs and they have been very dependable – GY-HM600, GY-HM850, GY-HM700 (my workhorse, not a single record failure in 20yrs).
I mostly film live stage events (performances, music, etc), so I rely on full operation the whole show. I can’t call “cut” if I have an issue. All filming is done indoors with climate controlled temperatures. With fully charged battery AND AC plugged in. Latest firmware installed.
FAIL 1 (previously reported in this forum):
Last year I decided to add a 4k cam to my inventory. I opted for the JVC GY-HC500U, since it would have a quick learning curve, was reasonably priced, and I relied on the dependability I’ve been used to.
About my fifth shoot with the camera on a live event, recording 4k/30 onto SanDisk 128GB SDXC Extreme Pro, the camera froze (image, switches, everything). I had to power off/on, ruining the uninterrupted recording (along with my client’s unwavering trust in me).
FAIL 2:
Having done some research (some here at CC), I suspected the SD card may have been the culprit.
For better dependability, I decided to add the internal SSD drive (Transcend 1TB 830S SATA III M.2 Internal SSD) with required JVC caddy JVC M.2 SSD Media Adapter Caddy for GY-HC500/550 (total cost: $580). This configuration allows recording UHD 10-bit ProRes HD/4k onto the SSD, which really does look amazing!
A few gigs in using this configuration, I formatted the SSD as usual, and began filming a live 60 minute dance performance to the EXT SSD card (1080/30, still wary of 4k at this point). 10 minutes in, I got a “MEDIA ERROR EXT” pop up (see pic), with no other onscreen info, camera then went into standby mode, which was a different failure mode than the previous. I had to wait and restart recording (losing about 10 seconds). This happened 6 times within the hour! For a one-camera dance show, that’s a big problem (if you don’t believe me, google “dance mom stereotype” for more info).
After the gig, I did some testing. Hit the record and let the camera record (up to 4 hrs, cam limit) at 1080/30. I first formatted the SSD in cam each time. I started a recording about 10 times, and only once did it make it to 4hrs. All the other times got the EXT error anywhere from 5 to 40 minutes in. Re-performed test at 4k. Same failure pattern.
FAIL 3:
Maybe incompatible SSD? I checked the JVC site for compatible SSDs. My previous Transcend was not listed. The recommendation was WDS100T2B0B (for 1TB), which, of course is no longer available. I did find a WDS100T3B0B (same WD SATA SSD M.2, just a “3” where there was a “2” in the part number). Another $260.
Did same run test with similar failure results. The first run went the 4 hrs, but not once after that.
Camera had the latest firmware installed (GY-HC500_V0300-0255.UPD) but I went ahead and re-installed it anyway.
Re-test, same failures, except now it appears to be happening quicker: 10 errors averaging about 3 minutes each.
Camera has 170 fan hrs, mostly in testing. Again, all in normal indoor ambient temperatures.
Still suspecting SSD, I did find a “refurbished” WDS100T2B0B (original part number listed at JVC). I just ordered it. Another $199. Total investment in SSD thus far $1039, which is over 40% of what I paid for the camera!Will retest when I get new SSD, but I’m not optimistic.
Any ideas?

