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#21
I'm a bit confused now. Are your "test machines" new PC's from Dell?
I did ask "Are you using the VGA or DVI connections? Might be worth swapping them round!"
Can you respond please?
Display dims slowly
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New #22
All the machines are new from Dell. All same make and model. They all got pushed the same image from the same source. They do have various monitors. The PCs have video output of Display Port and HDMI. The monitors have either DVI or VGA inputs. There has been a mixing and matching of combinations between the method of connecting the monitors to the PCs. It has occurred on all combinations. We have not found any combination that is worse than another. We cannot not reliably reproduce it. A PC may have it happen twice in one day then go a week before it happens again. Another may have only have had it happen once. Most have not had it happen. The worst complainers are Doctors who tend to exaggerate anything that is an inconvenience however they are the reason why the company exists so they much be placated.
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New #23
The common denominator appears to be the PC's so I think you should push the supplier but have you tried the settings previously suggested in posts #6 and 7 ?
To remind you that was set everything to Never and use the balanced plan then click "Change plan settings" set to "Never" see two screenshots below:
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New #25
There are pass through adapters and depending on what formats are being used can either actively or passively. For example connecting DVI to HDMI is a simple passive adapter as the main difference being DVI doesn't have the pins that pass sound that HDMI does have. While there needs to be an active component converting Display Port or HDMI to VGA but that is a common adapter to get as many older projectors only have VGA input and newer laptops only have HDMI out put. It is the same idea when USB first came in the need to convert either PS2 to USB or vice versa for keyboards and mice.
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New #26
Then it might well be the quality of the cables and or adapters that is causing the problem. How about taking the cable and adapter from one of the troublesom setups and use that cable and adapter on a machine hat hasn't shown the problem and see if that setup dims? You are probably aware that there are at least four different levels of quality in HDMI cables!
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New #27
Yes and we have swapped the cables, adapters, PCs and monitors to test the various combinations. We have not found a consistency between them all. And the biggest issue is not being able to reproduce the error on a routine bases.
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New #28
If you have just one setup where you know for sure the dimming occurs, have you tried the recommended set up as outlined in my post #23 qbove?
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New #29
It isn't only one set up it has happened on all the setups. Which leads me to think that there is a setting someplace deep that is causing the issue.
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New #30
Then there is nothing to loose in trying the setup in post #23 above but you seem reluctant to try this?
I am assuming that the PC's all came with Windows 7 pre installed. What has been installed on them all by yourselves? As we haven't heard anymore about Dell's input lets assume that all the PC's were OK when delivered! So what has been added since. Only the programs that been added to ALL of the PC's are the possible culprits!
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