Question about Dell Vostro 230 Slim Tower PC Desktop

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What are the components that you need to remove before removing/replacing the power supply on a Vostro 230 slim tower

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Posted on Jan 02, 2017

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SOURCE: My vostro 200 slim tower wont turn on PLZ READ FULL

There could be a hardware problem on the computer if the power button led light is "Orange/ or amber", if you can open the computer, try removing one memory card at a time and see if the power button will change.

Posted on Dec 15, 2009

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joecoolvette
  • 5660 Answers

SOURCE: My vostro 230 slim tower will not power on. I have replaced the power supply

Did you perform the test to see if the problem was the Power Supply, or Power On switch, F-i-r-s-t?

The Power On switch is bypassed, but has nothing physically to do with the switch.

A jumper wire is used to temporarily connect the Soft Power On wire, (PS_ON) to ANY Ground wire.

IF the Vostro power supply comes on, you have a bad Power On switch.

IF the Vostro power supply does Not come on, you have a bad power supply.

Also; Power Supply is new? Doesn't mean it's good.

Not directly indicating that you have a bad Power Supply. I think it's a $5 ATX power on switch,

http://www.directron.com/atxswitch.html

With the above test however, you will know.

The Soft Power On wire is in the 24-pin ATX main power cable. It is Green in color.
General example of a 24-pin ATX main power cable, and it's respective connector on the motherboard,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

(Note* Color of connectors does NOT matter )

View the photo to the far right. See the Green wire going into the BACK of the connector?
This is the Soft Power On wire.

Observe the photo in the middle. Note you are seeing the Front of the connector. The wires go into the Back of the connector.

For each wire going into the Back of the connector, it ends in a metal female terminal, at the Front of the connector.
Resembles this,

http://www.molex.com/molex/products/datasheet.jsp?part=active/0002081202_CRIMP_TERMINALS.xml&channel=Products&Lang=en-US

(The connector has square socket holes. This makes the rounded end of the Molex female terminal end, look square)

The 24-pin ATX main power cable is plugged into the motherboard, as shown in the photo to the far right, and the computer is plugged into power.

The jumper wire is inserted down into the BACK of the connector, RIGHT NEXT TO THE EXISTING wire that is already there.

Slides down into the socket hole of the back of the connector, right next to the Green wire, and then touches the female metal terminal end.

It has to slide down into the socket hole far enough, to ensure that it touches the metal terminal end.

A paper clip is preferred for the jumper wire.
The paper clip is straightened out, then bent into a U-shape.

The middle of the U, is wrapped a few times with black plastic electrical tape.
This area is for your fingers to hold onto.

The 'legs' of the U go down into the socket holes.
One 'leg' down into the socket hole with the Green wire.
The other leg goes down into ANY socket hole, with a Black wire in it.

ALL Black wires are Ground wires.

The contact made is no more than 2 seconds.
(The ATX power on switch is a Momentary Contact Switch)

There may be a spark. Warning you in advance.
However you are only dealing with 5 Volts DC.
In comparison two D cell flashlight batteries store 3 Volts DC.

[ You push the Power On button. The plastic Power On button in turn presses against an ATX power on switch.

When a Power Supply (Computer) is plugged into power, there is a constant 5 Volts (DC) standby power present.

With the Power On switch being closed temporarily, 5 volt power is re-routed through the Power Supply.

This 5 Volt standby power 'excites' the Power Supply, and turns it on.

{ To go further;
The first chipset on the motherboard to receive power is the BIOS chipset.
The Basic Input/Output System (BIOS) is initialized.

BIOS looks to see what devices are installed, does a Ram Memory count, turns the Processor on, and hands the computer over to the Operating System.

Windows XP and Windows 7 are two examples of an O/S.
Operating System ]

To replace the Power On switch;
The ATX power on switch is located inside the plastic Power On button assembly.

After time of constant heat inside the computer, and age, the plastic starts to harden.
This can make the plastic brittle, and want to break, when you try to remove the ATX power on switch.

There are two methods you can use to soften the plastic, and try to keep it from cracking, or breaking;

1) Front Panel removed, Power On button assembly removed;
Use a hair dryer set on low to soften the plastic.
Constantly move the hair dryer around.

2) Front panel removed, Power On button assembly removed;
Use a bowl of the warmest water that you can stand.
The old Power On switch is going to be thrown away anyway, so it doesn't matter if it gets wet.

For additional questions please post in a Comment.

Regards,
joecoolvette

Posted on Mar 14, 2012

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see attached photos of what bad caps look like in case you remove the supply to look at it.
6_15_2012_4_55_42_pm.jpg6_15_2012_4_56_02_pm.jpg

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6_11_2012_5_15_58_pm.jpg
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6_11_2012_5_16_36_pm.jpg
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How do I get to the motherboard? I need to replace


angel153_3.jpg

This for the Mini Tower version


angel153_2.jpg
This is the slim tower version.

On the board you will look for a coin cell battery, like those you use on watches, key chain remotes, and cameras. They look like money change; the size of a quarter. There will be a metal latch that you depress and the battery should prop up.
Replace battery in the same way you found it,

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