Recently, Sony announced that they would temporarily suspend FS5 firmware v4.0 downloads due to issues occurring in specific applications of HLG in HD shooting modes. Today Sony reports that the minor bug within PXW-FS5 (v4.02) and PXW-Z150 (v2.02) Sony firmware updates has been rectified and the firmware has been fully tested and is now fully functional. Customers that previously downloaded the original version of the firmware update, prior to its removal from Sony's website, are recommended to download and update with the new version so as to avoid any chance of encountering the initial bug. Sony firmware updates

PXW-FS5 Firmware V4.02

 Contents of update
Ver4.02 (Functionally, it is the same as the Ver.4.00.)
V4.02 fixes the following issue:
1. Video image may be recorded with short delay of 2 or 3 frames of audio in other recording modes than AVCHD.
2. When choosing [HLG1],[HLG2] or [HLG3] in the PictureProfile and CENTER SCAN in the CAMERA/PAINT menu, rebooting the camera may cause brightness and color shift.
Ver4.00(For your information)
1. Support for High Dynamic Range (HDR) by shooting in Hybrid Log-Gamma** (HLG) standard
2. Support for continuous 120fps High Frame Rate (HFR) recording in 1080p with CBKZ-FS5HFR (sold separately)
3. Option to change the minimum ISO sensitivity number to ISO 2000 from ISO 3200 when recording S-Log2/S-Log3
*4K: XAVC-Long 4:2:0 8-bit, HD: XAVC 4:2:2 10-bit.

PXW-Z150 Firmware V2.02

 Contents of update
Ver2.02 (Functionally, it is the same as the Ver.2.00.)
V2.02 fixes the following issue:
1. Video image may be recorded with short delay of 2 or 3 frames of audio in other recording modes than AVCHD.
2. When choosing [HLG1],[HLG2] or [HLG3] in the PictureProfile and one of the HD recording modes, rebooting the camera may cause brightness and color shift.
Ver2.00
1. Support for High Dynamic Range (HDR) by shooting in Hybrid Log-Gamma* (HLG) standard
2. Support for high-quality streaming using QoS by network client mode
3. Support for the system link (tally display and synchronized recording) with RM-30BP Remote Commander (sold separately) and MCX-500 Multi-Camera Live Producer (sold separately)
4. Support for the enhanced zebra marker function and two types of setting are available. Also the level settings can now be adjusted in 1 increments
*4K: XAVC-Long 4:2:0 8-bit, HD: XAVC 4:2:2 10-bit.
The Sony firmware updates are available for download from the below links:
PXW-FS5 V4.02: Download here
PXW-Z150 V2.02: Download here