Member Avatar for mikepeta

I have a Toshiba Satellite a75 S209 that does not power on. When I plug in my power adapter all I get is the green led on the front of the laptop for power blinking non stop, no sequence just fast blips for ever. The led on power supply stays on solid. Every once in awhile if I unplug and replug back in, the power led and the orange battery led stay solid for about 3 seconds then it returns to infinite blinking on the power led and that's it. I have tried removing battery and holding down power button to no avail. When led on front for power blinks the fan on the bottom does a 1/4 turn every time it blinks. Any ideas would be very helpful. Thank you.

  • 6 Contributors
  • 5 Replies
  • 304 Views
  • 4 Years Discussion Span
  • Latest Post Latest Post by babyelepante

Dani AI

Generated

The pattern you describe — a continuous fast blink of the power LED with the bottom fan twitching a quarter turn each time and only very brief moments of steady lights — shows the machine is getting raw power but immediately going into a protection/fail state. gave good symptom detail; and confirm the battery-removal step was tried already, and others (, , ) have suggested service-level causes (CPU/GPU/chipset). The best approach is a short, methodical hardware triage that narrows the fault before any parts are ordered.

Start with the AC/DC side: verify the adapter is the correct rating and actually outputs its rated DC with a multimeter, or try a known-good Toshiba-compatible adapter. Inspect the DC jack and its solder joints for looseness or movement while powered (do not short anything). Look for swollen capacitors, burn marks, or a smell of burnt electronics on the motherboard near the power/charging area. Those visual clues often point to a failed charging/DC-in subboard or power-regulator components.

Next, rule out simple removable parts: with power removed and battery out, reseat or swap RAM sticks one at a time, and remove HDD/optical/mini-PCI cards then try powering up (this eliminates peripheral shorts). If you are comfortable, a CMOS reset by removing the coin cell for a few minutes can clear an EC/BIOS hang that sometimes causes immediate shutdowns. If you have a meter and know where the power-rail test pads are, check whether the main rails come up briefly and then collapse — that behavior points to a short or protection trip on the motherboard.

If adapter and DC jack check out and you still see the blink/quarter-turn behavior, the likely next step is motherboard/board-level repair (DC-in board replacement, power MOSFETs, or motherboard replacement). Because this is a component-level fault, take careful ESD and safety precautions if opening the case, and consider a qualified repair shop if you are not experienced with board-level diagnostics. When contacting a repairer, mention the continuous LED blink and the fan twitch detail — it is a useful diagnostic clue.

Recommended Answers

All 5 Replies

Member Avatar for Bob_180_Bob

Hi and welcome to Daniweb,
There may be someone here with experience with this problem and therefore maybe a suggestion to try, but I think it is time to see a service tech and let them advise you on the situation. With the fan turning a 1/4 of a turn sounds like a power problem, but where that problem is??

Member Avatar for techsheaven

Try removing the battery, plugging in the power cord, and booting. Post results/changes.

Member Avatar for newbie fixer

I've got the same laptop with the same problem and I did remove the battery and pluging it back in and the light continues to blink and the fans continue the 1/4 turn any more ideas thanks

Member Avatar for Zurompeta

Same issue with Satellite L500. Tried everything found throughout google. Beginning to think it's the processor. Wish I had a known-working one to test it out with!

Member Avatar for babyelepante

The most that cost the problem is with the VGA and the Chipset wonder if you have those tools to remove those things in your country

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.