HP G62 Bad Resistor?

Discussion in 'Hardware' started by Silent Steve, Sep 2, 2012.

  1. Silent Steve

    Silent Steve Private E-2

    Hi, I'm working on an Hp G62 laptop and was wondering if anyone could offer some advice as to diagnosing it's problem. It will not boot at all, flashes 3 blinks from the battery led. Fan spins for about 3-4 seconds and then turns off. If plugged in the battery led lights up white for a few seconds then turns to orange. I've tried switching the ram and even turning it on with no ram with no change in behavior. I've also tried booting with no hard drive with no change. I'm in the process of letting it sit with no cmos battery to see if that produces any changes. Scouring the motherboard for bad transistors, resistors and capacitors I can only find one resistor that could possibly be an issue. I would like to attempt to desolder it and replace it but I'm not sure how to identify the resistor so I can buy another one. (or steal it from something.) I'll try and get a better shot of the resistor that I think it is.

    http://postimage.org/image/rhoyw6byb/

    Any help would totally be appreciated. I don't have any qualms about soldering the the motherboard. I like to fix stuff as a hobby but I think I may have gotten in over my head with this one.
     
  2. plodr

    plodr MajorGeek Super Extraordinaire Moderator Staff Member

    Have you tried removing the laptop battery (not CMOS) and plugging it in and firing it up? Some laptops won't boot when the laptop battery has a problem. I'm not sure if that model is like it but is worth a shot to see what happens.
     
  3. Silent Steve

    Silent Steve Private E-2

    yes I have. There is no change when the battery is out. After removing the cmos. The laptop now displays no blink codes, no fan movement and the power button merely flashes until I remove power. I used a multi meter to test the resistor I thought was bad but it turns out it was fine. I think the next step is to attempt to flash the bios and a visual inspection of the CPU. Then i'm thinking motherboard or CPU replacement.
     
  4. robbo26

    robbo26 Private E-2

    did you remove the resistor before you tested it? sometimes you can get a false reading when testing components on the circuit board
     
  5. Silent Steve

    Silent Steve Private E-2

    No I did not... I didn't even think about that.. if it's in parallel it would give a positive reading. I'll give that and replacing the eeprom a try after I attempt reflash the bios. Never tried soldering smd's before. I'll either fix it or destroy it beyond repair. Either way it will be fun.
     
  6. robbo26

    robbo26 Private E-2

    is the resistor colour coded, if so you will know the exact resistance it should be, resistors go high resistance when faulty.
     

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