Laptop have LED on but cannot be switch on the system

Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
https://homenol.blogspot.com/
https://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty./

Did you check to see if there is a fuse on the brake lights circuit?

If you changed the lamps and the brake switch it is obvious that they are not being energized.

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.

manufactured led light system in radio may be out...unfortunateley the only way to fix is to send it back....radio will be coded from theft and will not work after taken out unless you have the code...aftermarket replacements are available!

You may have a DC connector problem:

Symptoms of a broken power jack
1. If you wiggle the power cord or the AC Adapter connector on the back of the laptop, the power LED and battery charge LED start to flicker.
2. Battery will not charge in the laptop.
3. Laptop runs fine off a charged battery.
4. With the AC Adapter connected the laptop appears to be dead.
No power LED or battery charge LED activity.
5. Laptop randomly powers off without any warning.

If your laptop is out of warranty, then you can fix the problem by re-soldering DC-IN jack on the system board. If it

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

Do you have it plugged in? Also, do you know if the battery is charging? You may have a bad DC connection.

Problem symptoms:

1. Laptop randomly shuts down without any warning.
2. Power LED and battery charge LED start flickering when you wiggle the power cord or the AC adapter tip on the back or your laptop.
3. The battery will not get charged.
4. When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).

The DC connector needs to be resoldered on the system board.


I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

1. 2-wires on each fog ligth
2. toggle switch 2-hook up
3. okay run hot wire from battery to one side of toggle
4. on fog ligths one wire migth be white or black
5. take one of the wire on fog ligth (white)&other fog ligth (white)wire
6. take a wire hook both white wire from both ligths an hook to this wire an run it to the other side of toggle
7. black wire on ligths hook them to ground
8. after you hook the ligths up an they work it best to put a fuse connector between one of the wires on toggle

The third break lights are LED and the circuit board may have gone bad or the solder may have gone bad. The circuit board is built in the third brake light and is a seal unit. You may have to replace the unit, there is a relay for the third brake light and that is located on the glove box behind the panel that say's relays. There are three relays in there, the center is for the fuel pump and the two out side are for the A/C and third brake light. Just swap them around and see if the brake lights come on. Good luck and keep me posted. 

the switch has gone out and needs to be replaced.

Follow the below check list

Check1 : is power cable connected properly to computer

try checking all the cables are fixed properly

Check2 : Are you listining to Beep sound when your computer is poweron

IF yes then Ram is working properly

IF no then remove and fix your ram chipset again

Steps to do so..

switch of computer ..

open cabinet

You will find ram slot...press bars at both the ends ram will comeup directly..insert the chip again (donot press forcibly ) press gently untill you hear a click sound...

Switch on computer you should hear beep sound and computer will boot.

Thanks.....