Wednesday, October 20, 2010
The vostro 1520 uses the standard nine pin, circular barrel dc jack that dell has been using for years.
The dc jack is located on the motherboard and needs to be desoldered properly then a new power jack soldered on.
After a new dc jack is installed the laptop powers up and charges the battery.
This G71 came in with the no life whatsoever to the laptop. A small white light should illuminate when plugged in and that was out too.
The g71 uses a cable style that plugs into the motherboard dc jack vs. the traditional soldered onto the motherboard style power jack.
After the cable dc plug is installed the laptop powers on and charges the battery.
The MA8 laptops are almost identical to the MA2, MA3, and MA7 series gateway laptops. The difference is the MA8 has upgraded hardware and newer technologies.
Once inside the power jack voltage pin looks oxidized and loose. This dc jack will need to be desoldered and a new jack soldered back on.
After the dc plug is replaced the laptop works like new again.
Monday, October 18, 2010
The Acer D150 differs from the D250 with a smaller length cable and different tip that plugs into the motherboard.
The acer d150 does use a cable style dc jack that plugs into the motherboard vs. a plug thats soldered directly on the motherboard.
After the new power cable is installed the laptop powers up and charges the battery.
Tuesday, October 12, 2010
- “If you have a dc jack problem the motherboard needs to be replaced”.
This is the number one quote I hear from users looking for dc jack repair. Many computer repair centers and large companies (dell, gateway, acer, Toshiba, etc.) will tell you the only way to fix a dc jack is to replace the entire motherboard. This is very costly and simply untrue. The dc jack can be safely and successfully removed and new power plug installed.
- “Can I repair the dc jack myself?”
This is a pretty common question I get asked. It’s not impossible to do this yourself but you need the equipment such as quality soldering iron (and tips), desoldering braid or pump, and a steady hand. I’ve heard people say, “soldering is easy”. Soldering can be easy but desoldering is usually the tricky part for most people. Also knowing where to pry and how to properly remove cables without breaking retention devices is a must. Lots of laptops that people have attempted the repair themselves can’t get the old solder out and or broke the connections on the motherboards for things like touchpads and keyboards.
- If the dc jack gets repaired once it will fail again.
This is true and false. A quality dc jack repair can last for the life of the laptop. At the same time it can go bad again. Some laptops have poor design or design flaws that can’t be changed and are likely to reoccur.
- Epoxy and epoxy like substances should be used to reinforce the dc jack.
The problem with epoxy is it suffocates surrounding circuitry causing motherboard failures. Components on a motherboard (voltage regulators, capacitors, power filters) heat up due to voltage running through them and should not be covered by epoxy products. Sometimes dc jacks fail due to cold solder joints and epoxy will do nothing to combat that problem except make it harder or impossible to get the dc jack off safely.
- All laptops with dc jack problems are repairable.
If your laptop is displaying the dc jack symptoms it might not be the power jack or a symptom could be another different problem. For example, I get inquiries stating the laptop won’t charge the battery. I also find out the laptop does work when plugged in. This means the dc jack is working but something else on the motherboard has failed. Another example would be sometimes when the laptop is disassembled I find out the motherboard is burnt near the voltage pin. This is a pretty common occurrence on gateway laptops and replacing the dc jack won’t help. The entire motherboard would need to be replaced in this case.
Once taken apart the dc jack looks and feels solid but due to the cold solder joint problem on these models gets replaced anyway.
After the old dc connector is de-soldered off the motherboard a new power jack is soldered on.
When the laptop is put back together it powers on and charges the battery. Assuming no one has attempted a jack replacement this type of repair comes with a one year warranty.
Now that Acer bought gateway they are using the acer style dc jack. In my opinion it's the same poor quality used by gateway but a different style. It uses a five pin, 1.65mm tip jack that I've been working on for years.
Once disassembled the old dc jack needs to be de-soldered directly off the motherboard and a new power receptacle soldered back on.
After the dc jack is replaced the laptop powers up great and charges the battery.
This A355D laptop had a cable style dc jack that was pushed back inside the laptop. This is the classic symptom for these newer toshibas.
Once torn down the dc jack is fine but the bottom plastic of the laptop that holds the jack into place is broken. This usually happens due to excessive force to the dc socket or lots of plugging and unplugging of the power cord.
Fortunately in this case the plastic is still there and can be glued back into place with a special glue. It takes atleast 24 hours to dry but when done the dc plug is rock solid and can be used like new again.
This 1545 came in with the power plug pushed back slightly inside the laptop. Once inside the circuit board wasn't damaged and the dc jack was de-soldered and a new dc jack installed. Sometimes the damage is severe enough the entire circuit board where the receptacle is located needs to be replaced.
Once put back together the laptop powers on and charges the battery.
Once inside I discovered the cable jack was fine but the plastic on the base of the laptop that holds the jack into place was broken. This can be remedied by using a special glue to hold the jack safely into place.
Once dried the jack is rock solid and holds into place nicely.
Monday, October 11, 2010
I received two around in the same week and both felt pretty solid and I couldn't wiggle the power cord tip in just the right way to get them to power on. I decided to go for it and install the jack anyway and to my surprise both laptops powered on. The voltage wire had come undone causing a break in the connection.
After the new cable jacks were installed the laptops powered right up!
This particular 6240 had the dc jack pushed back inside the laptop. It uses the standard five pin, 2.5mm averatec dc jack.
The dc jack is located on a small circuit board that can be access when the laptop is completed taken apart. The first step is de-soldering the old broken jack off this separate circuit board. When the jack is off and the contacts clean and properly de-soldered it's ready for a new dc jack.
Once the jack is installed the laptop is put back together and it powers on/charges the battery.
The emachines M6809 is a six pin, 1.65mm dc jack that similar gateway mx7000 and W series laptops use.
When the emachines laptop was torn down to the motherboard the voltage pin had oxidized and almost looks slightly burnt. Like all repairs the dc jack is de-soldered and removed, then a new dc jack is soldered on.
After the input jack is replaced the laptop powers up!