Mr.Fox, Grall,
Thank you both so much for these advices.
Grall said:
I believe you need not worry that much. Since the lamp is off already when the fan cuts off it won't be getting any hotter than it was while running (no power = no heat dissipation), and since it tolerates running-condition heat levels it should tolerate cooling off from running temp without the fan.
That's quite comforting and does make sense. At least I hope. The lamp I am currently using is at ~800 hours (the last one reached ~4400 hours). Anyway, I am just about to order a spare, in case this one does die due to these errors I am getting.
Mr. Fox said:
It could be the device that you switch FROM that triggers a bug, or a combination, does it happen when you switch from any device?
Do you have the latest firmware on both the rotel and the hw15?
When you enable CEC on your projector, do you see the Rotel and all devices connected to the receiver in the "device list", or do you seee only the PS4? CEC builds a tree of all devices that the projector reads from the receiver, so any corrupt data there could make some very random bugs, the PS4 change could tigger a bug completely elsewhere, it could come from any device in the tree, not just the active chain.
I have to admit, I have never used CEC, just knew that my projector had that option and at the time the PS3. I didn't do much research and I simply turned the feature "on" without it actually ever working. Now that I looked into it closer due to the problems with the 1.7 update, I just realized that it's a feature that doesn't seem to work anyway, due to the way I hooked up my devices. Seems that my Rotel receiver does not support it or filters the signal, as the projector does not see any devices when I check the CEC setting for devices.
Due to the crashes, I have disabled CEC on the projector and on the PS4. My Rotel doesn't support it, so there's nothing to enable/disable there.
As for the firmware updates - I think I am on the 3rd last recent firmware. There haven't been any updates since at least 2011 and I have checked the release notes and felt it wasn't necessary, as they are quite a bit** to get loaded (no USB or internet connection). In order not to break anything, I actually went to B&W headquarters (here in Switzerland) and got it flashed there last time... go figure.
The projector, I assume, is on its original firmware, as I never updated anything there. In fact, I wasn't even aware I could - no option in the menu as far as I can see or anything. Would need to check the manual.
In anycase, I think the problem is at two ends:
- PS4 doing something with the 1.7 update that is not accoarding to spec triggering an unhandled exception/crash on the projector or a bug
- projector crashes and doesn't handle the crash as it should - as evidently by the immediate shutdown without cooling-down phase
Anyway, since last night, I haven't attempted any further tests. Seeing that disabling deep color didn't do the trick (which accoarding to reports is causing problems for quite a few customers outthere), I am have enabled HDCP on the PS4 and left deep color disabled. I think this is at least the config that is being touted as a possible solution for those with the HDMI issues.
I'll find out tonight if it still happens or not... I am also yet to find out if it makes a difference if PS4 is being booted from standby or complete shutdown. *I don't think* it made a difference, but will try to check this for sure.
I am also yet to disconnect the Rotel from the chain to see if the problem still happens...
I have to say, I really hope that Sony is aware of what this 1.7 update has caused and right now, it feels like I am the only person where the issue is so severe, that it could potentially break equipment - or cause heavy wear and tear.
It's one of the big drawbacks when using audiophile higher-end equipment (talking about the Rotel here) - some of the faults are just mind boggling (on the software front) and there are usually fewer solutions available since these devices are less "outthere"...