Member Avatar for lukoed

After turning on I don't see the POST. The screen stays black and the only sound I hear is ventilator noise. The small display just near the main switch with dvd-rom symbol on it lights red. I've pull out the dvd-rom module, replaced the hard drive, battery module and memory plate one after one (I have two of them) - the same result. What can be wrong? One my assumption is the laptop power connector. The central rod in it became loose. I could check it but not sure how to get inside. Can anybody give me a hint? Another assumption is cpu. The only thing I know about it that it's Intel Centrino because of the sticker on the dashboard. Can anybody give me more information about it? To check or replace cpu I also need to know how to open my laptop.

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  • Latest Post Latest Post by Anshuman123

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A short, practical diagnostic note based on the thread so far: the symptom set — no POST, fan spins, black screen and the DVD-bay LED glowing red — most often points to a power-delivery or POST failure rather than a bad CPU. already tried swapping HDD, battery and memory plates and pulled the optical bay; was right to highlight the loose center rod in the power plug, and is correct that bad RAM can produce a no-POST condition. The list below orders tests from low-risk to more invasive.

Quick, low-risk checks

  • Verify the AC adapter output with a digital multimeter. The measured DC voltage should match the adapter label within a few percent. If the voltage drops or the LED/behavior changes when the barrel is wiggled, the adapter or the DC jack is suspect.
  • Attempt power-on with battery removed and AC connected, and vice-versa if possible. Try a known-good compatible adapter if one is available.
  • Remove all removable peripherals (HDD, optical bay, Wi‑Fi card). Boot with a single RAM module in the primary slot, then swap modules and slots to rule out a bad stick or slot. (Memtest or BIOS boot is useful only after POST succeeds.)

If the unit still won’t POST

  • Look (carefully) for diagnostic beeps or LED blink patterns. An external monitor can quickly rule out a bad LCD/inverter vs. a full POST failure.
  • A loose inner pin on the barrel usually means the jack or its board mount is damaged; that repair is commonly a jack replacement or reflow and is cheaper than a full board swap. CPU failure is uncommon in undisturbed laptops; “Centrino” names Intel’s mobile platform, not a single CPU model.

Safety and next steps

  • ESD precautions and organized screw tracking are recommended before opening the case. Full disassembly instructions are available in the service manual for the 450ROG; if unfamiliar with laptop repairs, board-level diagnosis and jack soldering are best left to a repair shop. If low-risk checks fail to restore POST, the fault is likely at the board/power-circuit level.
Member Avatar for mechbas

You're probably on the right track with the power prob. Undisturbed CPUs do go bad but almost like never. If you don't know how to open your laptop it's best that you leave it to someone who does.

Member Avatar for USNSVT

I have the very same issue with mine and am also not sure how to proceed, please if you find anything out let me know

Member Avatar for Anshuman123

I had the same problem and I discovered that one of the RAM was bad.Try removing one RAM keeping other at the place.Try this with other RAM as well.If it does not fix the problem then here is the link to the service manual.U can easily open up ur 450 ROG using this. http://tim.id.au/laptops/gateway/gateway%20450rog.pdf

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