Fan failure DELL T3500

[k0c3to0]

Hello guys,

I change my PC fans and when i start it,there is appearing a meesege.."front fan cage failure".
The new fans are with 4 pin molex and motherboard can't see them,there is the problem.
So if someone know how to fix it,or how I can remove the messege on start screen please tell me!
The PC is DELL T3500.

Sorry for my english im from Bulgaria.Thanks!

 

[william p]

The Dell T3500 like most Dells uses high powered industrial fans from Delta, or Nidec, etc. Typically they draw from 1.2A. to 1.8A on a single 5 pin plug (4 wires) with a different pinout than ATX standard. The 2 fans in my T3500 were Delta fans of .9A each running off of 2- 5 pin plugs. I think they shared one controller for 1.8A draw.
The T3500 is an modification of the BTX layout that the T3400 followed. In BTX there is one system fan it blows on the VRM and CPU then out the back of the case. Fan failure is very serious so the BIOS tests the MB fan every startup. if it doesn't like what it finds it sets the error message. The message won't clear until you go into the BIOS/Maintenance/SYSLOG screen and clear it manually.
I'm curious what kind of fans you installed that were better than the 120X38mm .9A. Deltas it came with? They really are better than almost any aftermarket fans.

 

[Susquehannock]

No simple way to change that.

In T3500 fans need to be connected with 5-pin to the small front controller board (behind on/off switch) where fan sensors are. That board connects to the motherboard with a 40-pin ribbon cable.

Here is Dell page about front board:

>> http://en.community.dell.com/support-forums/desktop/f/3514/t/19589015