I have had just had my H2C heatsink and the motherboard of my XPS730 H2C replaced. Now when I boot up the BIOS says
Alert! M/B Fan Cable Not Detected
F1 to continue and F2 to enter Setup.
THe problem is that the H2C system replaces the motherboard fan with its own liquid cooled heatsink. There is clearly a location which the motherboard fan is able to plug in its 3 PIN power cable.
The technician I had said he was unable to help me with this issue since all accounted cables have been plugged in. We have looked through the BIOS setup and there was no option to override this error message. The XPS Manual offers no explanation either for the installation of the H2C system. All it says is to plug the H2C power cable into the mainboard.
. I have reflashed the BIOS to the latest 1.05 and that didn't give me any new options or solve the problem. I called Dell Technical Support and they said there was no BIOS settings or jumpers to change. They said it must be a cable.
Currently Dell XPS Support said they will send a technician in to re-inspect the computer and get them to call the Dell Phone Tech Support to see if they have overlooked anything.
Does anyone have experience with this problem?
Also does a MCP temperature of 78-80 degree on boot up (idle) be a bit high? I'm using the NVIDIA Control Panel which I hear can report temperatures higher than they really. Is this related to the motherboard fan/cooling not performing properly?
Just like to add that this problem also occurred without the replacement of my motherboardDell Technician #1 was given the wrong parts and did not do anything. Waited 45 minutes on hold for the phone people to try and re-order the correct partDell Technican #2 originally thought he had to replace the motherboard and had taken my motherboard out of teh case. Then he found out that he was not given a spare motherboard. So what he did was just replace the H2C heatsink. After he did that there was the "Alert! M/B cable not detected". This was without changing the motherboard. Dell Technician #3 replaced the motherboard and the error message was still there.Dell Technician #4 just came and left 1 hour ago. He was unable to solve the problem. All cables are connected from the H2C (only one power cable right?) He then plugged the motherboard fan (the fan that cools the north and south bridge) and booted up the computer but the BIOS still says "Alert! M/B cable not detected". He thought maybe you just need a dead jumper to trick the BIOS but obviously this was not going to be the case. So then he just connected the small motherboard fan onto the all the other fan connectiions (aux fan, rear fan etc) The only fan connector we could not test was the CPU fan power connector since the H2C system makes it next to impossible to squeeze a cable in. When I get the error message on the BIOS I also get a "7F"; error code on the motherboard digital read out. If I press F1 for the BIOS to continue loading the OS then it changes to "FF"From the history of Dell Technician #2 (see above) it would seem its almost like a software setting that has been reset because of the loss of power rather than there was a jumper or some physical change in the motherboard since the removal of the original motherboard's power supply caused it to have the error message (as well as error message saying no Floppy Drive)Hopefully someone can shed some light to this problem. The XPS730 H2C system is now no longer available as an option on Dell, Australia's website. I don't think the 730x has this option either so it seems to be confusing the phone support tech people who keep on ordering the wrong parts for my technicians.Dell's response to the on-site technician said that they will order another H2C system part (complete with the intake radiator fan). They believe maybe the heatsink and shroud is up too much power for the motherboard to detect that it does have a cooling solution. I don't know if this will work or is it just one step in troubleshooting. I hope they send teh right parts. So far i've had 2 air-cooled heatsinks and 3 motherboard fans which are all for the non-H2C systems.
Dell XPS 730 H2C Q9550 4Gb RAM 8800GT SLI 2X500Gb. No overclocking