compaq m2000 cap problem

[skywalker]

I have 2 identical M2000 motherboards 1 that is working and the other is totally dead.
i have check the cap values(smd caps) on the working board to cross reference with the dead board
working caps 198uf 0.06 esr and on the dead board the value is 670 uf 0.09 esr. Do i assume the caps in the identical positon on the dead board need replacing.
Any help much appreciated

[shovenose]

Re: compaq m2000 cap problem

do they at all look bad? do you know the story behind the dead board? wen you put in cpu, ram,etc, wht happens?

[skywalker]

Re: compaq m2000 cap problem

They look fine i do belive the laptop was dropped at some point very minor crack to the plastic around the dc jack area . The board is dead when you power on no led's comming nothing.
I have read posts on another forum that the resistor and mosfet near the dc jack do have problems, I have checked these and they both have the same values.

[shovenose]

Re: compaq m2000 cap problem

oh its a laptop board?

[seanc]

Re: compaq m2000 cap problem

Pictures of what you're measuring please.
What are you using for measurements?

[skywalker]

Re: compaq m2000 cap problem



the caps around the maxim chip are showing totall higher values than on the working board

i am using a peak esr 70 to measure the values

Thanks

[skywalker]

Re: compaq m2000 cap problem

Any ideas. 37 views and only 2 replys. Any help much appreciated

[xaviero1412]

Re: compaq m2000 cap problem

using hot air soldering, try reflow that maxim 1544....
this chips certainly giving powering problem

[skywalker]

Re: compaq m2000 cap problem

Thanks for the reply will try this and let you know. Thank You