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without chime, fan start to spin automatically, no display

Hey guys, my friends just gave me this macbook pro, when i plug in the charger, fan automatically start spinning slowly, no chime, i havnt even tapped the power button, and when i try to shut it down by pressing the power button for 10 seconds, its dosent turn off (fan still keep spinning)

Only way i could get a response from the macbook pro, is if i press the power button (located at the keyboard) and THEN plug in the magsafe 2, and keep pressing the power button, after about 5 seconds fan start spinning extremely fast and theres a chime, then the apple logo and everything works as normal, except for the fans, they’re extremely fast and noisy…tried resetting SMC, PRAM already to no avail…

problem number 1: need to do the aforementioned method to start up my mac

problem number 2: even after it turns on, the fans are too terribly fast and noisy

one odd thing to notice is, when i unplug the battery, and plug the magsafe 2, fans dont spin at all, and if i press the power button, i get no response from it as well…

what could be the problem?, anything software?, tried completely new macos re-install, still the same!

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i posted the same question before, but before it had no display, and i managed to order and change the LVDS cable and now atleast i have a display and macbook is useable, so sorry if it violates any rules, im new here as well as fixing things..:)

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Ask your friend for a history of the machine, especially about any liquid damage to the keyboard.

Next open it up and examine the logic board closely for any corrosion or indication of liquid damage. See if any of the LSI indicators have turned red.

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he dosent know any history, literally got it from a junk yard, someone came to recycle it, i manage to chnage the LVDS cable and add some life to it, but problem 1, 2 still exists!.

And keyboard is completely functional once the laptop is turned on!

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iamfaizii さん、ありがとうございました!
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