Emachines E640

[BeginnerLVL1]

Hello,
i have two emachines notebooks and this notebooks won´t turn on.
I try changing ram modules, clear cmos, minimal configuration but this does not make difference.
I try reflow one of them and it´s start working, then i leave it on the desk, one week later it stopped work again.
I think it was no problem on GPU, maybe power board is bad? 19V power supply is OK.

Thanks for any help.

[sopik78]

Re: Emachines E640

Reflow is useless, do reball or change IGP if you have blank screen, there is HD4250 (216-0752001) AFAIK.

[Life Goes On]

Re: Emachines E640

If afther reflow it start working, then you have to replace it for new one.

[sopik78]

Re: Emachines E640

Don't agree, reflow is just a test, not long term fix and does not even help everytime but just in small cases. Reball can fix this for a long time, to replace these chips is necessary in less than 5% cases.
If it worked after reflow it shows, that the problem was probably in lead-free balls not in chip itself

[PlusCom]

Re: Emachines E640

Like Life Goes On told you, you must replace it. If you just reball it it will return to you very soon beleive me. The problem is not lead-free balls under the chip but inside the crystal.

[Life Goes On]

Re: Emachines E640

Don't agree, reflow is just a test, not long term fix and does not even help everytime but just in small cases. Reball can fix this for a long time, to replace these chips is necessary in less than 5% cases.
If it worked after reflow it shows, that the problem was probably in lead-free balls not in chip itself

I disagree, but everyone has their own way of working.

[meritosari]

Re: Emachines E640

Hello,
i have two emachines notebooks and this notebooks won´t turn on.
I try changing ram modules, clear cmos, minimal configuration but this does not make difference.
I try reflow one of them and it´s start working, then i leave it on the desk, one week later it stopped work again.
I think it was no problem on GPU, maybe power board is bad? 19V power supply is OK.

Thanks for any help.

laptop could working if have primary voltage like +19v, +3.3valw and +5valw (+3vpcu and +5vpcu)

[sparker1]

Re: Emachines E640

I disagree, but everyone has their own way of working.

I agree with you but I'm just going on my own experience. Check this video out from a professional. https://www.youtube.com/watch?v=1AcEt073Uds

[Life Goes On]

Re: Emachines E640

And for that after reflow, if it work, you have to change it for new one, otherwise soon of late it will come bck to you.

[sopik78]

Re: Emachines E640

I don't know guys how many reballs have you ever made, but if you are experienced, have profesional stuff and skills, there is no reason to be worry about. I have made hundreds and hundreds of motherboards and less than 3% came back in 3 months of waranty and most of them work for more than year and longer. More than 95% of ati IGP HD3200 and HD4250 have only problem with balls, not with chip itself.
And the point is, the customer do not want to pay for 40-50$ more for new chip for laptop 4-8 years old if he have the option reball with warranty. of course there are customers that choose new chip, but in minority.

[sparker1]

Re: Emachines E640

I'm just an amatuer/hobbyist and have had bad experience with reballing so now I buy new pre-soldered chips and that has been a better way for me. Professionals wouldn't have the woes I encountered with it. New chips are not always expensive and they save me a lot of time. That video I referred to has turned me off reballs but I admit there are people on this forum who have continued success with it.

[Life Goes On]

Re: Emachines E640

I don't really like reballing but sometime there s not other choice, but it take to much time and i don't know for sure that it will fix for good.

[sopik78]

Re: Emachines E640

Of course everybody works on his own experience and due to his equipment. In this case time is not important, if there is no complication I am able to complete a motherboard in about 20-30 minutes from desoldering chip, cleaning, reball, soldering back a cleaning with IPA. What time it takes to you with new chip? I think it will be similar.

But we are out of the topic now I guess. There are more options hot to do, important is what to do and it should be ATI IGP here with the most probability.