23" Cinema Display with DVI-ADC Adapter. Won't turn on with 8800 card...

I am running Windows XP on a pc. I have had the ACD 23" with the DVI to ADC adapter for 4 years now and it has been flawless. I ran this using an nVidia 6800 Ultra card and then an 8800 GTS 640 MB card. All was well. I just got a 2 new cards for 2 diferent pc's and neither will recognize or turn on the monitor. Both a brand new HD 2600 pro ATI card and an NVidia 8800 GTS 512 card. The monitor works fine with my 2 PC laptops via their DVI connections and my MBPro. So it appears the monitor is fine. This is not the "can't see the monitor in the bios" issue, I can't even use it as an additional monitor in dual view mode when at the desktop as it is not recognized as being connected. Any ideas?
PS I also applied the latest bios update to the nVidia card from EVGA.
Thanks,
Reed

Did anybody find a solution for this?
I bought a new T420s. The second week I had to send it in service because it was not turning on anymore. I couldn't convince them that the laptop suddenly restarts several times a day. And only after two weeks when it did not start anymore they told me to send it in the service.
No they brough it today. They made my day happy for 10 minutes until I turned it on and the wireless problem described in this topis apeared. The Inetl diagnostics tools installed with the card say: "Hardware radio is off". It worked before being send into the service.
Now, the wireless switch is on and I see the adapter installed by "no wireless connections available".
Pressing Fn-F5 it tells me to turn on the radio (the switch thing). But that is already turned on.
So I called again to ask them what is wrong. They told me they would send me a new mini wireless card that I can replace myself. I received it today, replaced it. BUT THE SAME BEHAVIOR!!! (((((((((((((((((((((
So I wonder, can the service guys (Wädenswil, CH) be so unprofessional to have forgotten to connect/enable the switch button?
PS:
1. The wireless LED is not turned on at all.
2. BIOS has wireless enabled
3. Device Manager sees the unknown network adapter (when driver uninstalled) and the Intel Wireless adapter (when driver installed)
(This double failure means a divorce from Lenovo products for me. Once I solve this issue I sell the laptop.) Yes I know service is better than other, but I want something that doesn't need it at all.
At least the Dell guys send a guy (freelancer service guy) at my place to fix the isssue. Now it is not only the costs for shiping it and investigate the problem (that are on my side) but also the productivity problem now costing us more than one month not beneffiting 1 minute from this laptop.
A very sad,
Gabriel

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