Gigabyte GA-EX58-UD5 -> only Clr CMOS lit on first startup Tags: Gigabyte Motherboards Last response: June 8, 2009 9:32 PM in Motherboards Share simari_2009 June 7, 2009 7:42:34 PM Hi folks, Have just setup a new pc with the following spec in an Antec 1200 Twelve Hundred case: Intel Core i7 920 2.66Ghz Gigabyte GA-EX58-UD5 Intel X58 Sapphire ATI Radeon HD 4870 OCZ Reaper 6GB (3x2GB) DDR3 PC3-15000 (1866MHz) Tri-Channel Western Digital Caviar Black 1TB SATA-II 32MB Cache OCZ StealthXStream 700w Silent SLI Ready ATX2 Power Supply Sony Optiarc DRU-860S 22x DVD±RW SATAl On first startup, I hooked up just 1 mem stick (2gb) and left out the Sony optical drive. On powering up, all I see is the Clr CMOS switch lit up and nothing else. None of the fans startup, no other leds just the Clr CMOS switch, I've checked the following: - MB is seated properly with all grounding posts in place - Power cords secured into MB (2x4pin for the cpu and 20+4 pin for the MB) Am at a bit of a loss as to what I could try and do next since early indications suggest that no power is being supplied to the mobo or even the cpu. Any suggestions / help would be greatly appreciated. More about : gigabyte ex58 ud5 clr cmos lit startup | E-mail me updates | Report abuse Register or log in to remove simari_2009 June 7, 2009 10:23:21 PM Made some progress. Reseated all components including motherboard for the umpteenth time. However, finally realised that I was plugging in the power switch the wrong way !! Schoolboy error System started up with 1 mem stick, hd and graphics. Will add the remaining 2 sticks, optical drive and hopefully should be on my way to an enjoyable session of pc building | Report abuse doormatderek June 8, 2009 2:32:00 AM actually, it doesn't matter which way you plug the power switch in on the motherboard.... So that means it was a different problem... | Report abuse bilbat Motherboard Authority June 8, 2009 3:01:56 AM Ahhh - doormatderek has it right - the power switch is just a momentary contact spst pushbutton - no polarity involved... Yet another WTF moment in computer construction! | Report abuse simari_2009 June 8, 2009 9:32:14 PM Interesting, as this is exactly what I thought to begin with. But the only wire connected differently when it worked was the power switch, hence my assumption. I suppose rebuilding the pc from scratch a couple of times resolved any loose connections, grounding issues. | Report abuse Register or log in to remove Ask the community Publish Tom's Hardware>Forum>Motherboards>Gigabyte GA-EX58-UD5 -> only Clr CMOS lit on first startup> Related ressources: ForumNo power, no beeps, only blinking blue CLR CMOS button ForumGA-EX58-UD5 and G.Skill DDR3-1600 6GB issue? ForumHard Drive Data Going to 0kb on GA-EX58-UD5 ForumGigabyte GA-EX58-UD5 - disk drive issues ForumGigabyte GA-EX58-UD5 and installing a Seagate SATA HD ForumBlack Screen / No BIOS with i7 920 + GA-EX58-UD5 ForumGA-EX58-UD5 and problems with SATA controllers ForumAsus P8Z68-V - VGA LED Stays lit . ForumGigabyte GA-X68A-UD3R won't POST ForumBootloop... Motherboard Issue? ( Gigabyte Z68X-UDH3-B3) ForumPreviously working computer now does not work. ForumStartup - powerdown, powerup ForumAsus P6T Deluxe v2 wont power up ForumWhich is better memory ForumIDE drives startup problem Forum1066 ram only running at 800 ForumGigabyte Motherboard and Asus Graphics Card problems ForumGigabyte EP43/45-UD3L + Corsair CM2X1024-6400 v7.5 ForumDDR2 1066 or above speed is only supported by 1 dimm per channel ForumGIGABYTE GA-EX58-UD4P -- POST Freeze? More resources Read discussions in other Motherboards categories BIOS Boot Chipsets ASRock Asus Chaintech DFI Elitegroup FIC Foxconn Gigabyte Intel MSI-Microstar !