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It didnt start one day, the lights come on in front, battery etc. but nothing is displayed on the montor, could something have been jarred loose, i tried plugging in an external monitor but that only worked once. Help. talk about frustrating. Im about to open the machine and see if there is anything loose. any suggestions.

oh and i cant hear the cpu running either.

thanks for any assistance..

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Dani AI

Generated

Given ’s symptoms (power LEDs and button lights respond, no visible image; an external monitor worked only once) and ’s note about the fan/battery, the probable causes fall into two groups: display-side hardware (backlight/inverter, LCD panel, or a loose LVDS cable at the hinge) or system-board/video-chip failure. A few targeted, safe checks usually separate the two and save unnecessary disassembly.

Diagnostic checklist (noninvasive)

  • Flashlight test: in a dim room, shine a bright flashlight across the LCD at a low angle. A faint desktop or BIOS text means the panel is showing image but the backlight (or inverter/CCFL) isn’t working.
  • External monitor test: connect a known-good VGA/monitor and power on cold. If the external shows BIOS/POST reliably, the graphics circuitry is likely OK and the fault is internal to the laptop display chain. If nothing appears anywhere, the fault shifts toward POST/motherboard/RAM/GPU.
  • POST and memory checks: listen for beep codes and watch LED blink patterns. Reseating RAM or trying a single memory module can resolve no-video POST failures.
  • Power-discharge: perform a static discharge (remove all power sources, hold the power button ~30 seconds, then try AC only). This can clear stuck states without opening the case.

If opening the chassis is chosen, follow standard cautions: document screw locations with photos, use an anti-static wrist strap or frequently touch grounded metal, handle flat ribbon connectors gently, and keep small parts organized. Inspect the display cable at the hinge and the inverter/connector under the lower bezel; compressed air can clear obstructive dust in the fan/heatsink. On older Vaio models a faulty inverter or CCFL backlight is a common, low-cost repair; intermittent external output or no POST points more toward board-level faults that are best handled by a repair shop, as suggested.

Priority tests are the flashlight check and a known-good external monitor showing BIOS—those two results normally indicate whether to replace/display-side parts or to escalate to motherboard diagnostics.

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Member Avatar for caperjack


oh and i cant hear the cpu running either.

thanks for any assistance..

I assume you mean cpu fan !fan usually only runs for a few seconds when booting ,then comes on when laptop heates up ,could be that you battery is dead ,try removing it and turn on computer with it out just the power cord plugged in

Member Avatar for jazzadelic

Caperjack,

thank you for the response, you may be right about the dead battery, however i am still not getting any display on my monitor. I know its on because the wireless switch comes on and off as does the mute (sound on/off) button...well they light up anyway. Ive also tried the function lcd button to know avail...im tempted to open the bottom of the machine..but a little wary...any more suggestions would be greatly appreciated.

:mrgreen: :?: :!:

jazzadelic

Member Avatar for caperjack

Yeah ,you should be a little weary of opening it unless you really know what you are doing,not much to be seen untill you take it completely apart .then what ?? you ahve to fiddle and put it all back together.You could open it and look for build up of dirt in the cpu fan ,heatsinc.
You say that hooking it to another monotor only worked once ,to me that means that windows is not running/working ,no video to display .
If you are not sure about what to do after you open ,maybe you should take it to computer repair shop!!

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