Hey, i have laptop Acer Aspire 5720zg with no power and lights. Adapter is checked and getting power ~19V. No lights with adapter and battery. My laptop motherboard number ICL50 LA-3551P. Any help where to look first?
My laptop acer aspire 5720zg dead (no power and lights)
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Re: My laptop acer aspire 5720zg dead (no power and lights)
Power button voltage ~16.1 V, when I press button voltage drops to zero.Last edited by povilas602; 01-16-2014, 12:25 PM.Comment
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Re: My laptop acer aspire 5720zg dead (no power and lights)
Check PL3 for 3.3v_alw and PL4 for 5v_alw, voltages must be present.
Look for PU3 (MAX8744E) thats your 5v and 3.3v regulator IC. Schem added. hope this helps...Comment
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Re: My laptop acer aspire 5720zg dead (no power and lights)
PL3 0.01 and PL4 0.07V, but for PU3 i don't understand what pin I must check for 5V and 3V...Comment
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Re: My laptop acer aspire 5720zg dead (no power and lights)
Now I checked PU3 PIN21 is 3.3V, but in #5 comment picture i mark two place where getting hot. Maybe PD2,PR2,PR3,PR4,PR5,PR6,PR7,PR8 in this place heat up. PL2 3.2V.Last edited by povilas602; 01-17-2014, 10:02 AM.Comment
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Re: My laptop acer aspire 5720zg dead (no power and lights)
Does not work, when PD3 don't been soldered, then PL2 was 19.2V, but when PD3 was soldered, then PL2 fell to 3.3V. What else to check?Last edited by povilas602; 01-18-2014, 03:52 AM.Comment
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