XPS 420 Diagnostic Lights Tags: CPUs XPS Light Last response: February 20, 2010 3:26 PM in CPUs Share guan8810 February 18, 2010 12:11:50 AM I have a 134 diagnostic light on my XPS 420. What should I do? More about : xps 420 diagnostic lights cjl a b à CPUs February 18, 2010 1:23:26 AM Did you change anything between the last time that it was working and now? That sequence isn't on the official diagnostic list, so it isn't that helpful unless I find a more detailed XPS 420 diagnostic manual than this: http://support.dell.com/support/edocs/systems/xps420/en... m 0 l guan8810 February 20, 2010 3:26:41 PM It was the graphic card issue. Motherboard ok. Thanks m 0 l Can't find your answer ? Ask ! Publish Related resources Diagnostic light in Dell xps 420 Forum Diagnostic light in Dell xps 420 Forum Lights 1, 2, then 1, 3, 4, Dell XPS 420 Forum Xps 600 diagnostic lights 4, flashing amber Forum Xps gen 4all diagnostic lights green but not booting up Forum Dell XPS 600 diagnostic lights 123 Forum XPS Gen 5 diagnostic lights..?? Forum Dell XPS 400 wont boot blinking amber power light and diagnostic light 1 only Forum Dell XPS 420 1,2,3 light, no boot. Forum SolvedFinal Upgrade to XPS 420 Forum SolvedEVGA GTX550TI 2GB vs GTX760 2GB in Dell XPS420 Forum Solvedxps 420 upgrade Forum SolvedI have a Dell XPS 420 with Vista, handed down to me, how to reset to factory default? Normal way not working. Forum SolvedI want to upgrade my Dell XPS 420 with a new GTX 760 or 770 GPU Forum SolvedUpgrade my Dell 420 XPS Forum SolvedDell XPS420 Intel Quad Duo to Intel i5-650 (cooler/heatsink)? Forum SolvedXps 420 no display device found Forum SolvedDell XPS 420 - Graphic Card And Ram Upgrade For Gaming? (HELP) Forum SolvedDell XPS 420 replacement PSU Forum dell 2400 diagnostic lights oooy Forum More resources Read discussions in other CPUs categories AMD Intel Intel i5 Intel i7 Phenom Cooling Performance !