i was trying to upgrade the video card on my T5500 from a GTX 560 to a Quadro k 1200.
after trying with the new card, i booted to a display showing no signal, and the diagnostic LED 2 on, and the power led off. also the network led is on without a network cable being connected to it
the manual says LED 2 is a PCI error. but i tried booting without the display card connected, and with no external peripherals, drives or connectors, connected. but the same result.
i removed the card, and i plugged in the older GTX card, and its the same case. I checked the grapohics card and PSU on another computer, they work fine.
im suspecting the motherboard is faulty now, but i would really appreciate some suggestions here, if there is something i missed.
Thank you for reaching out to Dell Community Forum.
The troubleshooting steps you have tried indicates an issue with the motherboard.
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