Power wont come on

Sounds like The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/

Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary

Sounds like main board fault. Power ON signal should come from the main board to power regulator board, to switch in ON from standby to power ON. Contact any service technician. The troubleshooting to this kind of fault is a skilled work. Not user repairable.
Gopakumar Gopalan Google

It sounds like a main digital board fault. Contact any service technician. To get more details, http://electronicshelponline.blogspot.com/

Most All-in-One Personal Computers (PCs) are based on internal laptop/notebook component technology.

The first item to test is the Alternating Current (AC)/ Direct Current (DC) Power Adapter to see if there is:

damage or a fault in the cabling;

damage or a fault in the transformer box;

a fault, damage or a loose connection in the AC/DC Adapter Jack point via which the AC/DC Adapter plugs into the PC.

If no AC/DC Adapter-related fault is evident or any such fault is definitively resolved (such as by testing a definitively functional replacement AC/DC Adapter), then his sounds like either a Loose AC/DC Power Jack detached from or short-circuiting its Motherboard Solder Points, a Power Management problem on the Power Management Tracks, Electrolytic Capacitors or Power Management Contoller Integrated Circuit (IC)/Chip on the Motherboard or a Graphics Chip or Graphics Card damaged surface or Motherboard Solder Point Contact fault.

Any of the 3 internal faults described above would require specialist internal diagnostics, repair and testing by a technician with specialist laptop repair experience and specialist Infra Red Workstation, BGA Reballing StationMicro-Soldering, Oscilloscope, and Multi-Metering equipment.

DC Jack repairs are likely to be moderately expensive. Power Management or Graphics repairs are likely to be more expensive still, but if conducted by a professional, all three repairs should resolve the problem. A competent repair technician should be able to repair these faults and offer a minimum 3 month warranty on a reoccurrence of the same fault.

So, on the symptoms described in the question, yes. Unless it is just an AC/DC Adapter fault, this will probably prove to be a serious, non-DIY repair problem, I'm afraid.

No power to the printer. 1) Either the power adapter is not connected properly.Remove the power cord from main power outlet and connect it to any other electric outlet.Also at the back of the printer there is a socket where the power got get connected.Remove power wire from there too and reconnect it. 2) If the problem is not solved then there are two possibilities:-- A) The power cord is faulty and needs replacement. B) Or the printer circuit board is got short and it has to be replaced. ------------ In both the cases A as well as B you need to get the fault checked by other spare power adapter or power supply board in printer.At local printer repair shops they have this parts in spare.They will get the fault checked and let you know that which part has to be replaced.Either the power adapter or power supply board.The cost of new power adapter is near to $10 and cost of new power supply board is near to $40. -------------- One more thing i want you to check is.In your printer power adapter there is one three pin power wire is connected.That three pin power wire wire goes from main power outlet to the printer adapter.In some cases that three pin power adapter gets faulty.If that three pin power wire is faulty then the cost of that power wire is just $2.So get that three pin power wire also checked. To see how this three pin power wire looks.See the fig below:---
If this wire is faulty then its not much costly. ----------- This are all the possibilities that you will have to get checked.To get the fault confirmed.Thanks.Helpmech.

Possible that the battery is short or there is error in the mother board. You can remove the battery and make a test with the adapter to see if the LED goes off. If so there is fault in the main PCB. If the Power led stays on then the battery is short and must be changed.
Have the adapter also checked for the correct Voltage/current factor or this can also be the fault.

If the output voltage is cheked it can be confirmed. It is possible tto repair the unit if it has failed. so opne it up and check if the fault is minor like the failrue of fuse in themains or in the secondary section . If so replace and test on printer to ensure it is not blowing out again. If so there is a powerr short onthe main printer board.
However If the adapter is not working evenif fuse is intact, it must be checked with a multimeter to confirm the fault .

Either the motherboard or the ac adapter might be ba. Make sure the outlet your plugging the laptop into has power first.

Once you verify that then try using the AC Adapter and see if that works. If it doesn't work and it only turns on from the battery for 30 seconds then you need to try a new AC Adapter and see if that fixes it, if it doesn't then its a motherboard issue at that point cause the means its not seeing the AC Adapter properly.

Remove battery , attach ac power , turn on , if the laptop still has problems you've at least ruled out battery fault , sounds like faulty hardware somewhere alright but where??