Member Avatar for javeedsyed

Hi, i have a sony vaio pcg k415s notepad, yesterday when i try to install linux on it i wokr fine but before it finishe installation i left the system in office open and in runing condition. but when i check it in the morning its seems to dead. nothing coming only pover light is on, its blank screen, i try with RAM replac, and even with battery and power replace start up. but its of no use. same problem with blank screen without going to bios. i try to opne it up but becoz of fear i dont dare to do that. can u suggest me wat to do now... please reply as soon as possible

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Short summary and what to focus on: reports a PCG-K415S that now only shows the power LED and will eject the optical drive but produces no fan sound, no POST activity and no external-video output. raised screen/inverter and drive possibilities earlier; given the added detail (no fan, no beeps, no external video) the troubleshooting should shift toward basic power/POST diagnostics and the mainboard/power circuitry rather than the display or hard drive.

Quick diagnostic checklist (do these in order, keep the machine unplugged when removing parts):

  • Verify the AC adapter: swap with a known-good Sony-compatible adapter or measure the adapter voltage against the label.
  • Power-reset: remove battery and AC, press and hold the power button 20–30 seconds to drain caps, then try AC only.
  • Minimal-boot: remove HDD, optical, PCMCIA/WiFi cards and other externals. Try to power with only CPU, motherboard and one RAM stick. Test each RAM stick in each slot. Try powering with no RAM and listen for beep/LED error signals.
  • Watch LEDs/beeps: count any blink/beep patterns and record them (these are diagnostic keys for service manuals).
  • External monitor and backlight check: if the internal panel is faint, shine a bright light across it to see a ghost image (backlight/inverter test) — only do this if an external monitor test is inconclusive.

If comfortable opening the case:

  • Inspect the DC jack area, voltage regulator caps and the motherboard near the power supply for bulging caps, scorch marks or loose connectors.
  • Try removing the CMOS/clock battery for a few minutes to reset the BIOS if it is user-accessible.

When to stop and seek service: if there is still no fan or POST after the minimal-boot and power-adapter swap, the symptom pattern usually points to failed power rails or motherboard faults. Avoid repeated power cycles if you detect burning smell or visible damage; a reputable laptop repair shop or Sony service can identify failed regulators or the BIOS/power controller.

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Member Avatar for raybay

The VAIO PCG k415s has a long history of LCD screen inverter failures. Is your screen white, or dead gray. The inverter costs us $72, but some charge as high as $140. Sony charges $155 to replace it at their tech center.
You can replace the inverter in other laptops such as Dell and IBM for half that.
The job is tricky enough that you should have it done by someone who has knowledge in that area, AND who can get the part, which is difficult.
Try out other failure possibilities first. Another possibility is hard drive failure, so first try booting to a floppy, and then another hard drive.

I doubt the problem has anything to do with Linux, but think through everything you did to be sure it isn't a silly mistake.

Member Avatar for javeedsyed

The VAIO PCG k415s has a long history of LCD screen inverter failures. Is your screen white, or dead gray. The inverter costs us $72, but some charge as high as $140. Sony charges $155 to replace it at their tech center.
You can replace the inverter in other laptops such as Dell and IBM for half that.
The job is tricky enough that you should have it done by someone who has knowledge in that area, AND who can get the part, which is difficult.
Try out other failure possibilities first. Another possibility is hard drive failure, so first try booting to a floppy, and then another hard drive.

I doubt the problem has anything to do with Linux, but think through everything you did to be sure it isn't a silly mistake.

but i try with other monitor its shows the same problem, the screen looks like same when it is in off state, i cannot even hear the sound from the laptop which it use to give, when started, to be clear my laptop situation is like it is in off mode even is start. no fan sound no nothing but only the power on light and i can eject cd rom by pressing the button.

Member Avatar for javeedsyed

The VAIO PCG k415s has a long history of LCD screen inverter failures. Is your screen white, or dead gray. The inverter costs us $72, but some charge as high as $140. Sony charges $155 to replace it at their tech center.
You can replace the inverter in other laptops such as Dell and IBM for half that.
The job is tricky enough that you should have it done by someone who has knowledge in that area, AND who can get the part, which is difficult.
Try out other failure possibilities first. Another possibility is hard drive failure, so first try booting to a floppy, and then another hard drive.

I doubt the problem has anything to do with Linux, but think through everything you did to be sure it isn't a silly mistake.

but i try with other monitor its shows the same problem, the screen looks like same when it is in off state, i cannot even hear the sound from the laptop which it use to give, when started, to be clear my laptop situation is like it is in off mode even is start. no fan sound no nothing but only the power on light and i can eject cd rom by pressing the button.

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