[SOLVED] Charger won't power laptop

[nooky]

Laptop: Dell i7559 i7-6700HQ, GTX 960M

Laptop is getting no power from charger at all, won't charge batter and can't run off AC. Upon disassembly, I found slightly burned sections of the motherboard in the DCIN area. Can I possibly fix this with some soldering or is this motherboard done for?

Pictures:

https://ibb.co/MPGZY2f

https://ibb.co/TrsRst5

 

[tighteewhitey1111111]

I got a lot to say so get ready. One this type of problem is very common. I once had a business going doing nothing but DC jack replacements. Usually it's mechanical meaning someone trips over the cable and physically breaks the input jack. That circuit board looks cooked from what I would expect to see under high magnification. You want to look particularly hard for solder runs that have delaminated from the board. If that happens, the board is gone and trying to fix it is a waste of time.

First thing to do is make certain your power supply is putting out the correct voltage. Use a multimeter.

There is exactly one computer repair business in my 7th largest city in the United States that does motherboard repairs on laptops. They usually charge you for the diagnosis, and then charge you for the repairs. Before I did anything, I'd research the price of a replacement motherboard. What if you could pick up a used one off of eBay for $50? You never know. Also figure out what the value of the laptop would be if it were 100% functional. That will give you some context to put your cost to repair into. What percentage of the overal value of the laptop are you willing to pay to get it repaired? 30%? 50%? 75%? 125%? (lol).

I hate laptops, and this is the #2 reason (#1 is the small screen). Laptops are fragile and poorly made. I've had situations where nearly-new laptops have been destroyed simply by falling off someone's bed in the middle of the night.

If possible, it might be nice to try to get a charged battery into the thing and see if it will run on battery only. If it won't, then you can assume component/motherboard damage.

 

[Mockss]

from the images you mobo looks pretty done for , have you tried a a different charger?

 

[nooky]

Tried multiple OEM chargers, none worked. Battery works fine, but laptops like this devour the charge in an hour or two. Couldn't find any delamination but I'll test it when I find my multimeter. It's a gaming laptop so mobo replacement is very expensive since high end CPU+GPU come soldered on to the board. I'm looking at 50-60% of it's current value just to buy a replacement. It's an old laptop and its had its days, but I guess it's time to put it to rest.

 

[Mockss]

Tried multiple OEM chargers, none worked. Battery works fine, but laptops like this devour the charge in an hour or two. Couldn't find any delamination but I'll test it when I find my multimeter. It's a gaming laptop so mobo replacement is very expensive since high end CPU+GPU come soldered on to the board. I'm looking at 50-60% of it's current value just to buy a replacement. It's an old laptop and its had its days, but I guess it's time to put it to rest.

sounds like it could be the mobo , you should take it to a shop near you and see what they recommend?

 

[nooky]

sounds like it could be the mobo , you should take it to a shop near you and see what they recommend?

Yeah but just looking at the costs of replacements online, its just not worth it to me

 

[tighteewhitey1111111]

Yeah but just looking at the costs of replacements online, its just not worth it to me

You might consider parting it out on eBay to recover some of the lost value. Screens in particular. Didn't know they actually soldered CPU/GPUs to the m/b on "gaming" laptops, so that's new information, thanks. One "last ditch" effort: It might be worth posting on "bad caps" forum. They have a clique of actual electronics (not computer) technicians who actually do component removal and replacement on motherboards. Crotchety, crusty and weird (no lie) old men that might have some insight you won't find anywhere else.

 

[nooky]

You might consider parting it out on eBay to recover some of the lost value. Screens in particular. Didn't know they actually soldered CPU/GPUs to the m/b on "gaming" laptops, so that's new information, thanks. One "last ditch" effort: It might be worth posting on "bad caps" forum. They have a clique of actual electronics (not computer) technicians who actually do component removal and replacement on motherboards. Crotchety, crusty and weird (no lie) old men that might have some insight you won't find anywhere else.

Gotcha, thanks!