03-15-2017 10:30 AM
Hello all, This is my first post here.
I'm very happy to find you and hope everybody is well.
My son was given a laptop with no hard drive or memory. I have bought memory and put it in but I wanted to know is the laptop works since I do not see any lights on the laptop itself. According to the previous owner, he just took the memory and hard drive out but I think there is something else wrong.
So the laptop does not turn on (I don't think it needs a hard drive plugged in to turn on)
it does not give me any error LED codes
Monitor does not turn on
Fan does not move at all
but I tested the power supply and it is providing I believe it was 20v or 19.5v.
I'm not sure if the Power Jack adaptor might be broken (one of the leads) and this is not supplying power properly.
Can someone tell me any suggestion to get this laptop powered on?
I will include the picture of the power jack, can someone tell me how can I test the voltage across the 5 leads shown?
what voltage am I suppose to get?
Thank You all for your help!
03-15-2017 12:05 PM
Hi chipilin ,
Welcome to the Community Forums.
I don't think the battery still have charge to test if it will still power on .
Will any battery indicator (page28) led comes up when the ac adapter is plugged?
Power check out from the hardware manual ( page 21) guide describes isolating the power issue.
Checking the AC adapter on the same page shows pin 1 should have 20 V and the DC in power jack most likely have closer value to it aside from physically checking it if loose or with bad pins (page 58-59) ideally removing the battery first just in case battery may be affecting it aside from any other connected device. Note that power board can also be isolated as point of failure (item5 page86).
Systemboard level testing is not offered typically due to OEM privacy as others try to find motherboard schematics (example here) from other sources but cannot guarantee accuracy. Harddrive is not needed but RAM (DDR3L-1,600 MHz SODIMM × 2 (max 16 GB)) is required for a good POST .
Update us how things go .
03-15-2017 12:58 PM
03-15-2017 01:26 PM
Hi chipilin ,
Getting motherboard schematics for voltage test points maybe hard to find but at least should give out reading on a voltmeter (0 or 1) to narrow down points of failure from DC in jack to power board to systemboard as seen in the hardware manual.
Service center usually have spare parts to test with like Best Buy but have service charge for just checking.
Right now , we know we have a functional ac adapter but would not harm if we have a spare to counter check it since previous owner claims that it was working before.
Hoping it was just a loose connection.
Update us how things go from here.
03-15-2017 07:22 PM
Looks like the Mobo is fried. I tried everything. I tested also continuity on the DC jack going to the mobo and it send power correctly. looks like there is a power issue in the mobo itself =/
It looks like the CPU is also soldered in so I can not even replace it.
thanks for the help.
08-10-2019 02:15 PM
I am having some issues as well that are similar to what you experienced. I am from time to time able to get it to boot. Seems intermitent, but I'm trying narrow it down. I have try a new battery, new DC plug, new ram. I thought maybe a loose connector, but I pulled it apart and didn't find anything loose. I don't know how to check voltage and such. But I came across another page that said it may have something to do with the cmos battery. In my two days of trouble shooting, it seems that when it will not boot, I can disconnect the battery, power supply, and cmos. Press the power button for 60 seconds, then plug in the power supply only(no battery or cmos), then it will power up. Now I am just disconnecting the cmos and leaving it that way. I'm going to see if that does anything. As of the last half day and about 15 reboots, it is fine. Crossing fingers it stays a fix.