Adapter LED flashing, laptop not switching on

[ben7]

Re: Adapter LED flashing, laptop not switching on

Hi thanks for checking, I have taken a closer image of the chip, i cant find anything that means anything to me through a google search, maby you'll know more about it than me. Heres the pic anyway.

Thanks

Yep, you read it right, it is an ISL9504

[aaronmarsh632]

Re: Adapter LED flashing, laptop not switching on

Cheers, I'll order 1 from ebay n see what happens after replacing it, just before I do I tried takin' the resistance readings again to see if I can get anything and now i'm getting something. I have numbered the pads and reuploaded the image so you know what pads im on about (I did remove the components, just reused the image for convenience)

1 - 44.2 for a second then changes to 1.2-1.1 average (then stayes at 1.1)
2 - anything from 76.4 to 114.8 for a second before just displaying -1
3 - nothing
4 - between 38 & 48 for about a second before displaying average 1.2-1.1 (then stayes at 1.1)
5 - 0.09
6 - 53 to 93.x before stabelizing on 0.06

It wouldnt give me any readings when touching the chassis with 1 of the multimeter prongs, so I touched 1 of the heatsinks screw cylinders instead which I figured would work, you can see what i mean as you can see it on the picture inbetween the circled capacitor and the cpu plastic holder.

is any of this info useful?

Thanks

[aaronmarsh632]

Re: Adapter LED flashing, laptop not switching on

Hi, finally got the power IC which I have swapped, but still doing the same, think ill call it a day with this machine now. Thanks for your help.