Update 1: computer randomly started working (no changes made since last attempt) about two days ago, for no apparent reason. everything worked fine, i played cod5/l4d, etc. then last night, i put it into "Sleep" mode... and this morning the problem is back, exactly as described. no video input to monitor. zero. THE PROBLEM IS CAUSED BY SLEEP MODE Update 2: i have reset the **** out of CMOS (through the jumper, removing battery for hours, booting without battery, etc... pretty much every way you can.) to no result. still can't even get a boot/bios screen. so the problem isn't a BIOS setting, i don't think. so that leaves my video card, which i see as unlikely because the first time this happened, my whole comp (vid card included) worked perfectly one morning, totally randomly... then relapsed when i put it into sleep mode the next night... or something else. wnay ideas? WHO CAN SOLVE THE MYSTERY? please help! fyi i am on vista 32-bit Alright. Today I got out of bed, ate, and went over to my computer (which I had left in sleep mode). The monitor wouldn't come out of "Power Save" (Dell widescreen monitor), which it does sometimes, so I did a restart. However, it didn't start up then, even though I could hear my computer starting up fine. Strange. I then tried again. And again. And again. Despire fiddling with the monitor auto detect settings, nothing helped. So I tried a different monitor. Same result. I then confirmed that the monitor worked by plugging it into a labtop (the one i'm typing on right now). Anyway, this problem is especially strange because I don't even see the boot-up screen or BIOS or ANYTHING, I never get a chance to go into safemode (I could try spamming the key for safemode while it boots up... I did try, but I think I was hitting the wrong key) or boot from a disc or anything. I can't go to the control panel, log in, go to my device manager, etc, I JUST DON'T GET ANY VIDEO INPUT. Period. I tried using DVI and VGA ports with the same result. Here are my specs: -Q6600 -680i Mobo -Nvidia 8800GTS (640MB, made by EVGA) -2GB Corsair RAM @ 800Mhz. So, I opened up my computer, de-dusted, reseated my card, RAM, all power cords, etc. No luck. Then I checked for bad memory by alternating sticks one at a time... No luck. So, my guess it that the problem is either something messed with the power supply (video card not getting enough power, even though the fan is going), or a dead video card. In summary, Problem: Zero video input. Can't access BIOS, safe mode, anything. Symptoms: Zero video input (monitor in power save nomatter what), computer starts up fine, no beeping from the case, fans all working, HD working, etc etc etc. Caps lock light on keyboard responds when I hit the key, and I think I can log in by waiting a minute then typing in my password and hitting enter (results in more HD noises, which happen when I log in) but still nothing on the screen. Checked: Connections, tested monitor successfully, reseated RAM and video card, checked power cords and connections. So. What the heck could be causing this? I'm at wit's end. And of course it had to happen on the day L4D came out. T_T Quick question: -What is the "safe mode" key? I doubt this will work since I can't see the BIOS boot up screen anyway, but it is worth a try. -How can I tell if it is my video card? -Does my 680i have onboard video? I didn't see any VGA plugs so i'm assuming the answer is no. -Is it possible for me to cannibalize my old 6800 card from my old dell (it uses AGP) and plug it into my 680i to test if my video card is the problem? Keep in mind I can't install any drivers or anything beforehand. I haven't listened to hear the windows boot up sound, i'll check for it. Oh another note- every time I restart, the numlock light on my monitor is on. Even if I turned it off on the previous boot-up. Which is strange. I don't know what i'm talking about, but could this mean that the settings for the computer are failing to reset (which could mean whatever screwed up the video output is not being fixed by a restart)? Please, i'm dying here. Help me out! Thanks in advance. Btw, if I can prove the problem IS my video card, I have a warranty on it so that isn't a problem.