Asus K50i laptop will not turn on.

[ElementalWindX]

Lady claimed she shut the monitor and turned it off, the next day tried to turn it on and it will not turn on.

Plug the charger in and no lights come on.


Any ideas of what I can do to troubleshoot this?

I'm assuming the motherboard is toast somehow, but I know some of you guys are really extreme into troubleshooting laptops and I'd like to know from your experience what this could be. Thanks.

 

[Boston Pro Comp Serv LLC]

Test the adapter first or try another? How about the DC jack? I think those are obvious so maybe you did that and just didn't mention it.

 

[DCGPX]

Well first thing I'd do is not believe what client said unless I've known them awhile.

Then try a known good adapter, personally I take batteries out on totally dead laptops. Some won't boot without one but I try it quickly anyway.

After that I'd be checking that the power switch actually works. I've since started using an inductive voltage tester for this as I've found it lights up if power going in when near screen.

If it does and power going in , I remove everything except memory and try again. Replace memory with known good if I have some.

If still no joy I'm inclined to start thinking mb at that point

 

[ElementalWindX]

Test the adapter first or try another? How about the DC jack? I think those are obvious so maybe you did that and just didn't mention it.

The adapter is an aftermarket targus adapter they claim to have used for years just fine. It lights up just fine as well. I guess I could test that.




By inductive voltage tester you mean something like: http://www.sterenusa.com/inductive-voltage-detector ? I have a few of those and never knew you could use those to test that haha.


I've cycled the bios battery, memory, and checked the dc jack which looks solid. It's one of those wire connector type of dc jacks (not soldered on) and nothing appears burnt. I've also tried without the battery in it.



It appears to me that this thing was dropped.

 

[DCGPX]

Yep, mines similar, it's quick and dirty but proves power going into the laptop, I test screen furthest from adaptor and then at various points to make sure it's live, you can semi prove by turning adaptor off to double check if your not sure it's detected right.

 

[Boston Pro Comp Serv LLC]

I've had plenty of adapters that have had lights on them that lit up but didn't power the laptop.

 

[DCGPX]

It appears to me that this thing was dropped.

Ha ha sorry but this is why I don't listen to clients versions, did they mention this bit might have happened?

 

[DCGPX]

I've had plenty of adapters that have had lights on them that lit up but didn't power the laptop.

I'd check this as well as we've both mentioned, I've had one laptop in other day that died nearly 4mths and they couldn't get on, adapter lit but no output, very quick fix and easy profit!

 

[brandonkick]

First of all, check the adapter the proper way with a voltage meter.

The sticker on the side of the adapter brick will tell you the correct voltage and polarity of the plug. If the voltage coming from the adapter is proper then you can assume:

1) The DC Jack isnt working

2) The motherboard is most likely crap

When plugged in you should see some type of indication on the laptop itself (via a light up led) that the power cord is plugged in and/or that the battery is charging.

Note I HAVE run into a special situation where a laptop wouldn't boot.

It was an HP Pavilion G60 519WM. I got it for $100 off of ebay, needed a new hard drive. I fixed it for $150 and sold it to my aunt for $300. She calls me a few weeks later telling me it won't turn on. I'm thinking oh damn, the board must have crapped. Turns out after some testing, that it was a USB mouse reciever that was causing the problem. The problem was also isolated to the computer dying while on standbye. She had the computer unplugged, set it down and left it for a day or two and by that time the machine died. After this happens, the machine REFUSES to power on if that USB reciever is inserted.

 

[ElementalWindX]

First of all, check the adapter the proper way with a voltage meter.

The sticker on the side of the adapter brick will tell you the correct voltage and polarity of the plug. If the voltage coming from the adapter is proper then you can assume:

1) The DC Jack isnt working

2) The motherboard is most likely crap

When plugged in you should see some type of indication on the laptop itself (via a light up led) that the power cord is plugged in and/or that the battery is charging.

Note I HAVE run into a special situation where a laptop wouldn't boot.

It was an HP Pavilion G60 519WM. I got it for $100 off of ebay, needed a new hard drive. I fixed it for $150 and sold it to my aunt for $300. She calls me a few weeks later telling me it won't turn on. I'm thinking oh damn, the board must have crapped. Turns out after some testing, that it was a USB mouse reciever that was causing the problem. The problem was also isolated to the computer dying while on standbye. She had the computer unplugged, set it down and left it for a day or two and by that time the machine died. After this happens, the machine REFUSES to power on if that USB reciever is inserted.

I used my inductive voltage tester and it is getting power all over the motherboard.

I'll test the power adapter next.

 

[NYJimbo]

some of you guys are really extreme into troubleshooting laptops and I'd like to know from your experience what this could be. Thanks.

You don't need to have extreme troubleshooting skills to do basic testing of power issues on a laptop. Is this the first time you had a laptop that doesn't power up at all ?

 

[ElementalWindX]

You don't need to have extreme troubleshooting skills to do basic testing of power issues on a laptop. Is this the first time you had a laptop that doesn't power up at all ?

I'm just readjusting and relearning how to troubleshoot certain laptop problems. When I was doing a lot of on site work, I almost never got dead laptops so it has been forever since I have had to do this.

I took my tester and put it on DCV with the - ... symbol and the charger tests 19.4V and the output says it is 19.5V.

I also tested the end of the DC jack connector inside the laptop and its also getting full 19.4V

Guess this is a dead motherboard. Any ideas from this point?


I have completely 110% disassembled this. Looks like the motherboard is all it can be. Sucks cause these boards cost like $250

 

[brandonkick]

I used my inductive voltage tester and it is getting power all over the motherboard.

I'll test the power adapter next.

Yep, mines similar, it's quick and dirty but proves power going into the laptop, I test screen furthest from adaptor and then at various points to make sure it's live, you can semi prove by turning adaptor off to double check if your not sure it's detected right.

Not much good. It shows you that it detects voltage, but not how much. Enough voltage to light the led doesn't mean that it has the proper amount of voltage.

I've had plenty of adapters that have had lights on them that lit up but didn't power the laptop.

Bingo.



As far as the original problem. Maybe try reseating the memory, but I don't think that will help in this case. Sounds like a dead board to me, unless you can meter test points on the board after the DC jack to confirm the correct voltage is making it past the jacks.

 

[Martyn]

Yes test the jack whilst connected in case the psu is clamping down under load. On that model you can get access to the plug on the motherboard from the jack loom by just removing the large panel on the bottom of the laptop.

 

[DCGPX]

Not much good. It shows you that it detects voltage, but not how much. Enough voltage to light the led doesn't mean that it has the proper amount of voltage.

I agree it's only to detect voltage, but I did say I only use it WITH a known good power supply to prove voltage going into laptop. It's just a quick way to see if any things getting in there.

I wouldn't use it using a clients psu when it's states unknown.

As Martyn's point says, there's still a check after if needed to see if its being pulled down.

One thing I like about my universal power supply is it whistles if current starts to rise! So it's helped in past