i have another laptop same model. unlike above, it shows same voltage from adapter to ac jack and to battery terminal.

does anybody have any clue whats wrong with my computer? can u suggest me anything? thanks

I have a Acer Aspier 4720Z. The problem I have is the compter wil not charge the battery or work when plugged in (if the battery is removed). I think it’s the DC board and input, the ac adapter is ok. I could easy replace the board but I don’t know how to get to it.

Here’s service manual for Acer Aspire 4720G, 4720Z, 4720 and 4320 series.
Now you know how to get to the power jack.
Good luck!

I have an Acer Aspire 6920G which has an unusal fault. It will not power up buy has a faint ticking sound. I stripped the motherboard bare & still the ticking sound persists. I have removed various caps, coils, resistors etc but still cannot work out where the sound is coming from! Is there an easier way to try pinpoint the source of this fault? I have tried listening all over the board by ear but the ticking sound seems to be the same – neither louder or softer. Are there components on a motherboard that would be more prone to tick when they have failed?

There are a few caps that are shorting in circuit. I removed & tested all of these and they are good but there still is a short. Strangely though this short does not affect the power supply to the motherboard ie. by turning power supply off or indicating there is a short (flahing led).

This is actually the 2nd motherboard I have come across with the same fault & still cannot solve this problem.

Any advice will be greatly appreciated!

Thanks in advance..

The adaptor light blinks when I connect it to the power supply

Is it normal? I believe it has to be on all the time when connected to the wall outlet, isn’t it?

Before replacing the motherboard, I would suggest testing the laptop with another AC adapter. Maybe the adapter is bad.
Did the laptop work on the battery power before?

as soon as I plug the jack into the laptop socket, the light on the adaptor goes off.

It’s not likely but possible that you have a damaged DC jack inside the laptop. Maybe it shorts something when the AC adapter is plugged.
You can remove the cover and take a closer look at the jack. Maybe the jack has to be resoldered. Just a guess.

where can I directly purchase a new one; can i purchase a particular model of motherboard directly, or will i have to deal directly with Dell?

The best way to find a new motherboard is searching on the internet by the part number. Usually in Dell laptops you can find the motherboard number on a sticker glued to the memory slot. There is a long string of number on the sticker separated by dashes and one part of number will look like CN-0MD666. This is the motherboard part number and you can google it or search on eBay. The number could be different for your motherboard.

It’s not necessary to buy a new motherboard directly from Dell but buy it from a reputable seller.

hi there my laptop is a dell latitude d600 it starts up and gets to windows xp loading bit then goes back to the start does it all the time

Sounds like software related problem. Could be corrupted registry.
Can you boot in Safe Mode? Try using Last Known Good Configuration too. You can access both if you press F8 as soon as Dell logo appears on the screen.

If nothing helps, you’ll have to reinstall Windows from scratch.

So, could it be the AC, motherboard, power board, or something else? How do I diagnose the problem?

I have a acer aspire 5630 for while, but now its not working properly, when I tried to start it, the fan runs only for 5 to 10 seconds and after that there is only power led on but nothing else is going on, i can’t hear hard disk sound etc, any suggestion??? I think its fan problem but am not sure about this

I think your problem could be related to the memory (RAM) failure.
You have two RAM modules installed, correct? Try removing them one by one. Try starting the laptop with only one RAM module installed.
If it starts fine with one module but not with another, the second one is bad.