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emachine no signal on, turn on shows no sig and goes straight to sleep. computer type emachine T3304 desk top pc AMD sempron 3300+, optic drive DVD/cd-rw, Hard drive 100gb ata, 256mb ddr sdram modem 56k, video nVIDIA Geforce 6100 pci express slot available. this originaly had windows xp. upgraded whole system to windows and windows 7 and down loaded free iobit security program. I noticed problem right after i was doing a security check i think either I or the security program had selected a driver for the monitor and deleted it. it started out turning on off intrmitenly then i shut down computer took apart put back to gether now just straight to no signal and then right to sleep. sounds to be runing fine just monitor signal bad. at the moment i have all cards , momry out ,etc..... as somone suggested in one of disscussions at this web site.i will fire it up in a few mins to see if she goes or blows cross fingers. (Also can somone please tell me the deffenitions to these VGA,dvi,Mobo,PCI,PSU,CPU.) it would be apreciated thank you

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  • Latest Post Latest Post by sparkax

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A concise, ordered troubleshooting plan to separate hardware from driver problems (built from ’s note that cards/memory were reseated and ’s earlier reply).

Start with the monitor and cable: verify the monitor’s own on-screen menu/LED works when powered and try the LCD on a known-good PC or laptop. Swap in a different VGA/DVI cable and try a different input on the monitor. If the screen shows no backlight but a faint image is visible when illuminated with a flashlight, the panel/backlight or inverter is the fault (monitor hardware), not the PC.

Check POST vs OS behavior next. If no BIOS/POST text appears (and no expected beep codes), focus on motherboard/GPU/PSU and seating: reseat the graphics card, try another PCIe slot, confirm any GPU power leads, and clear CMOS (remove battery briefly). If BIOS/POST text is visible but Windows never displays a desktop, the problem is almost certainly a driver or resolution/refresh mismatch.

Software recovery steps for a driver-caused black screen: Safe Mode entry on Windows 7 is via F8 at boot; use System Restore to a point before the security/tool install or uninstall the display driver from Device Manager and reinstall the correct driver from the GPU or motherboard vendor. If Safe Mode is unreachable, boot from a Windows repair/USB drive and run System Restore or Startup Repair.

Safety and next actions: always unplug mains and observe anti-static precautions before touching inside the case. If basic isolation still leaves no signal, test with a spare monitor or a spare GPU to identify the failed component. Record exact symptoms (LED color/state, fan activity, any beep codes, whether BIOS text appears) — that information rapidly narrows the cause.

Member Avatar for sparkax

VGA- Visual Graphics Array
dvi- Digital Visual Interface
Mobo- Motherboard
PCI- Peripheral Component Interface
PSU - Power Supply Unit
CPU- Central Processing Unit

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