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I have a compaq 6820,s and it won't power up, i get nothing, no screen, sound power, nothing at all. I change the power cord and nothing happen. So could anyone out there help me please?

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Try reseating the RAM modules, If this does not work then the RAM maybe faulty. Remove the RAM module/s and take them to your friendly computer repair shop and get them to test the RAM for you. If the RAM is faulty them it needs to be replaced.

Posted on Feb 25, 2012

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Posted on Jan 02, 2017

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seethis causes and fix it. God bless you
User Control and Display Board If the washer won't start, the user control and display board may be defective. Check for power to the washer first.
Timer If the washer won't start the timer might be defective. This part is often misdiagnosed, check other components before replacing this time
Line Fuse If the washer won't start the line fuse might have blown.
Thermal Fuse If the washer won't start the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.
Line Fuse and Holder If the washer won't start the line fuse might have blown, or the line fuse holder might be damaged and need to be replaced.
Main Control Board If the washer won't start the main control board might be defective. This is not common. Check other parts and causes first.

Door or Lid Latch Assembly If the washer won't start the lid switch assembly might be defective. This is a very common problem. The lid switch assembly can fail either mechanically or electrically. Test any electrical switches with an Ohm meter for continuity. The switches should have continuity according to their design.

Door Lock Motor and Switch Assembly If the washer won't start the door lock assembly should be checked. The door lock can fail either mechanically or electrically. Test any switches on the door lock with an Ohm meter. The switches should have continuity according to their design.

Incoming Power Problem If the washer won't start check to see if there is power at the electrical outlet which the washer is plugged into. Plug a lamp or radio into the outlet to check it. If the outlet is dead, check the circuit breakers or fuses for the hom
Power Cord If the washer won't start, check to be sure there is power to the electrical outlet for the home. If that is OK, the power cord itself might be defective. This is rare. You can check the power cord with an Ohm meter for continuity.

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Since you already tried another power cord (assuming that it was a working cord and for the exact same model). Then I would say your motherboard is dead.

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Toshiba satellitep205d-s7438 won't boot up


You need to be more specific and tell what happens when you plug in the power cord and press the power button. There are a number of reason why a computer will not boot, but if you tell what's going on someone can help you.

Computers don't boot for basically the following reasons, 1) the power supply is bad. That means when you plug it in you don't see any lights, and when you press the power button nothing happens, you hear no fans, no beeps, no blinking lights, no hard drive spinning, no cd drive clicking and nothing appears on the lcd screen.

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3) Static Buildup - try removing the battery and the power cord then Press and Hold the Power Button for 30 seconds. After 30 seconds put the power cord back in (leave the battery out) and Press the Power Button. If it boots up you had static buildup and can replace the battery, count your blessings and Thank The Lord cuz a dishonest repairman would have told you he had to replace the motherboard for $300

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Hello, did you consider thinking that the battery of power adapter cause this?

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Connect a known good inverter and Screen with the laptop's battery removed and power cord disconnected. The motherboard will power up without a screen or inverter connected if it's working. If not check F1 or FS1 on the main board power supply section. Also check the diodes in that area for shorts. Sometimes what happens is the screen or inverter gets plugged in while the battery or power cord is connected. Even thou the laptop is powered off it still has the standby voltage live.

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Disconnect battery and unplug from power, test for voltage on power cord and re-insert, hold down power switch. If nothing try battery without power cord. Still nothing (no lights, no sounds) then it may need system board replacing.

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