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After re-assembling a tower, it won't 'turn on'.

post #1 of 3
Thread Starter 
Alright, so at one point I had to take the PSU of the tower out to replace a damaged one for my server, and then I took the individual components to the tower and dis-assembled it for whatever stupid reason. Five months later, I need that tower again, so I get another PSU & re-assemble everything still present (I took some of the storage devices since I wasn't gonna use them anyway). Currently the motherboard, one 2 GB RAM module, the CPU/CPU heatsink/CPU fan, and the case fan are installed.

So once I have re-assembled everything, I connect one of the video outputs to a monitor & a keyboard to go along with it (Self evidently the power cable too) and press the power button. All the fans in the tower turn on, specific lights turn on, and there is no video output. I've checked the monitor and the cable, it is absolutely fine. I checked the PSU's light, its on and not flashing under any circumstances. The voltage selector switch is and has always been set to the appropriate position. I went through a good amount of Hewlett-Packard's troubleshooting information, holding the power button for five seconds to see if the system shutdown after turning on within those five seconds (Which it did).

Has anyone else experienced this problem, and does anyone have any advice? Its still during the 'break in' period for this thermal grease.
post #2 of 3
Try reseating your RAM and also try it in all the different DIMM slots. If that doesn't work try another stick of RAM that you know is working if possible. Quite often RAM can be the issue when not receiving a video signal.
    
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CPUMotherboardGraphicsRAM
Intel Core i7 920 EVGA X58 SLI LE XFX Radeon 6950 G.Skill DDR3 6GB Kit 
Hard DriveOptical DriveCoolingOS
2x Western Digital 640GB Black LiteOn 20X DVD RW Prolimatech Megahalems  Windows 7 Professional X64 
MonitorKeyboardPowerCase
BenQ V2420H Razer Lycosa Corsair TX750 Coolermaster HAF 932 
MouseMouse PadAudioAudio
Microsoft SideWinder X8 Razer eXact Mat Creative X-Fi Titanium Fatal1ty Creative I-Trigue 3400 2.1 Speaker System 
Audio
Roccat Kave Headset 
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post #3 of 3
First thought: I felt really dumb when I realized I had put my RAM in all the wrong slots, so that could be the issue. For whatever reason, if you have 4 slots and 1 module, there is only one particular slot it can go in to work properly. I think it is the second from the left.

Next thought: Do you have a case speaker / noise maker thing that goes "beep" when you start up the computer? Depending on what is wrong, it will sometimes beep in different patterns. I think a long held out beep is no video device found. You may not have a system beeper thing though; they are about $2 at a computer store.
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Livingroom rig
(9 items)
 
Retro!
(16 items)
 
DIY Laptop
(7 items)
 
CPUMotherboardGraphicsRAM
i5-3570K @4.3GHz ASRock Z77 Extreme4-M Radeon HD 7970 GHz 2x4GB Corsair Vengeance 2133MHz 
Hard DriveOptical DriveOSPower
Intel 520 SSD 240GB Bluray / DVD combo Win 7 Home 64 Seasonic 550W modular 
Case
NZXT Vulcan 
CPUCPUMotherboardGraphics
Athlon 64 FX-55 Clawhammer Or Athlon 64 X2 4200+ Manchester Asus A8N32 - SLI ATI Radeon X850 XT PE 
GraphicsRAMHard DriveOptical Drive
Or MSI GeForce 210 4 x 1GB Corsair XMS 500MHz OCz Agility 2 LITE-ON DVD 
CoolingOSPowerCase
Antec Kuhler 920 Win 7 Home Premium OEM Antec High Current Pro NZXT Phantom 
CPUGraphicsRAMHard Drive
i5-3360M @2.8-3.5GHz nVidia GT 650M @1GHz 2x4GB G.Skill 1600MHz Crucial M4 SSD 128GB 
OSMonitorCase
Ubuntu 12.04 11.6in, 1366x768 Clevo W110ER 
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