Question about Princeton Digital VL1716 17" LCD Monitor

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Alternate generic 12 volt power supply

Which of the DC power supply plug to the computer is + and whiich is -. Is the + the inside : or the outside C? I want to use a generic power supply and I want to hook it up correctly.

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Most power supplies have the markings on the plug end or the power pack end to identify which is (+) and which is (-).
These days you can buy the power packs with a set of adaptors and they have clear markings on the pack or plugs,If your unsure then the only other way is to use a multimeter used for testing power ,before you power up the computer,

TEST BEFOR YOU ATTACH YOUR COMPUTER

Posted on May 05, 2010

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OK, usually, the Center, PIN is always POSITIVE, The OUTER, Screen, is Always NEGATIVE. This "Polarity" is also usually indicated on the Power Supply itself, and Often right beside the "Power Socket" it is imprinted, with a diagram, of a dot inside a crescent., there is a Positive mark, to the Dot, and a Negative mark to the crescent. Your supply, will have to supply about 4 - 5 amps of current, at the right Voltage, I would imagine, make sure you have your current limiting set.

Posted on May 05, 2010

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Acer am 5100-e5310a has power but wont boot up


And we were following Anti-Static Procedures, when removing said ram memory?
If not you may be looking at using that motherboard for a Frisbee.

(Cleaned the gold plated contact pins with a pencil eraser? Just curious)

The two main causes of desktop computer failure is;
1) Computer is dirty inside
2) Power Supply failure

Someone who would have removed the Ram Memory, and reinstalled; I'm sure would have the inside of the computer cleaned out.

Got multimeter? (Got milk? Get it?................oh nevermind)

Test the 3 main voltage power rails;
3.3 Volts (DC)
5 Volts (DC)
12 Volts (DC)

(An inexpensive multimeter around here, ('States'), sells for $5 to $12. I've seen them on checkout aisle racks at major discount stores. Auto parts stores have them, but usually more expensive)

http://en.wikipedia.org/wiki/Computer_power_supply#Wiring_diagrams

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

('member; all Orange wires are 3.3 Volts, Red wires are 5 Volts, Yellow wires are 12 Volts, Black wires are Ground wires; and the cow jumped over the moon.




NO! You gonna' believe that last one?

Sheesh! You're so gullible.


It took the SHUTTLE )

Two D cell flashlight batteries produce 3 Volts DC.
The dangerous AC voltage, is kept within the metal case of the Power Supply.

No? Not feasible for you?

Use a KNOWN to be good, Compatible power supply for a test unit.

(I'm gonna' borrow the Power Supply, out of your computer for a test unit, honey.
I'll put it right back.
What? You'll break my fingers?)

Post back in a Comment with the results.

Regards,
joecoolvette

Apr 01, 2013 | Computers & Internet

1 Answer

Have a E-Machine that keep displaying in powersave mode


eMachines are a budget computer.

Designed to save the consumer money.
One of the items used that cost is saved on, is the Power Supply.

Power Supply is generic, and of low quality.
1) Low quality Electrolytic Capacitors
2) Low quality Power MOSFETs
3) Low quality Rectifier Bridge
4) Too small a gauge of wiring is used

Plus most consumers do not keep the inside of the computer clean, and if they do the Power Supply is usually neglected.
The two leading causes of desktop computer failure; the computer is dirty inside, and/or the Power Supply is bad.

With a weak voltage power rail you may see LED's light, and maybe fans spin, but there won't be enough power to turn the Processor on.

[No Processor operating, no computer. No computer = no video signal to the monitor. No Signal, Power Saver Mode, or Sleep Mode is indicated ]

1) If ALL of the LED's were lit up they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use from 51 to 125 Watts of power.
Just depends on what Processor it is.

See if there is an unused working computer that has a KNOWN to be good, Compatible power supply; that you can use for a test unit.

Or use a multimeter to test the three main voltages, coming out of the Power Supply
3.3 Volts (DC) [ Orange wires ]
5 Volts (DC) [ Red wires ]
12 Volts (DC) [ Yellow wires ]
[ALL Black wires are Ground wires ]

For additional questions please post in a Comment.

Regards,
joecoolvette

Oct 16, 2012 | E-Machines Computers & Internet

1 Answer

I need the dc power supply for SimpleTech 250GB USB2.0 7200 RPM External 250 GB IDE Hard Drive


Your solution is a 12 volt 1.5amp chord. With a negative outside/ positive inside plug tip polarity. Simple Tech model and part number: SYS1298-1812-W2

Jan 08, 2012 | SimpleTech 250GB USB2.0 7200 RPM External...

1 Answer

T6528 has no video. Using a working monitor, tried differnet video cards but still no video.


1) So you tested the monitor on a working computer? Reason I ask, is that you will be testing the monitor cable also.

If it is a monitor with a detachable monitor cable, suggest you test the cable also.

2) Each graphics (Video) adapter card has it's own specific driver.
The driver should be installed Before, the graphics card is installed.

Otherwise Windows will 'break it's neck', to find a compatible driver, from it's thousands of generic drivers.
Won't do. You will get a driver conflict.

Windows: 'Which driver do I use? These or THESE?"

Kinda' hard to do, since you can't see graphics on the monitor.

I would like to suggest you diagnose the Power Supply to start with. (After checking the monitor cable)

It may seem that the Power Supply is okay, but it could have a weak Voltage power rail.

Enough power to light LED lights, and spin fan's, but not enough power to turn the Processor on.

1) ALL the LED's use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts.

3) A typical Processor can use 51 to 125 Watts.
(Lower for older Processors)

The eMachines T6528 comes with an AMD Athlon 64 3500+, processor, that fits in a Socket 939 processor socket,

1) eMachines Support > T6528 > Specifications,

http://www.emachines.com/support/product_support.html?cat=Desktops&subcat=T%20Series&model=T6528

2) Information on the AMD Athlon 64 3500+,

http://en.wikipedia.org/wiki/List_of_AMD_Athlon_64_microprocessors#Athlon_64

Can use up to 67 Watts, or up to 89 Watts. Depends on what Core it is.
(Clawhammer Core, Newcastle Core, Winchester Core, Venice Core, Manchester Core, or San Diego Core)

(Also uses an MSI K8NGM-L motherboard. Below for specifications only,

http://www.newegg.com/product/product.aspx?Item=N82E16813130041 )

A) Not to down eMachines, (I have an old T1090 in my shop that works great), but they are budget computers, and use budget parts.
One being the generic Power Supply that is used.

B) The computer could be dirty inside, as well as inside the Power Supply.

The cooling components for the SMPS, (Switched-Mode Power Supply,) are it's Fan, and Heatsink's used inside.

Once a layer of 'Gunk' covers these cooling components, the cooling capacity drops tremendously.

Heat = Wasted Energy

The more heat, the more the Power Supply strains to keep up with the call for power.
Eventually hardware components inside the Power Supply fail, and the Power Supply is toast.

You can test the Power Supply voltages.
You can use a multimeter if available, or an economical unit can be purchased for around $5 to $12, that will suffice for testing.

You can also use a power supply tester.
One example:

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5250576&CatId=5471

Voltages produced by the SMPS used in a T6528 are,
A) 3.3 Volts (DC)
B) 5 Volts (DC)
C) 12 Volts (DC)

Testing should be done on the 12 Volt power rail.
11 to 13 Volts indicates a good Power Supply.
Less than 11 Volts means it's time to replace.

Orange wires are 3.3 Volts
Red wires are 5 Volts
Yellow wires are 12 Volts.

All the color coded Voltage wires, lead back to one individual power rail, for each Voltage produced by the Power Supply.

You can test any Yellow wire to test the 12 Volt power rail.

With a multimeter, the Positive (Red) probe lead connects to the power wire to be tested.

The Negative (Black) lead connects to ANY Ground wire.

ALL Black wires are Ground wires.
They all go back to one central Ground source inside the Power Supply.

[Power Supply unplugged from power before attaching probe leads. After connecting, the power supply is plugged back into power, and the Power On button is pushed ]

(Two C cell flashlight batteries produce 3 Volts DC)

Jun 20, 2010 | E-Machines T6528 PC Desktop

1 Answer

During a recent storm our power went out and a family member was on our Gateway 504GR. Since the power came back on, the computer will not turn on. It was plugged into a surge protector and all other items...


Suggest the Power Supply took a 'hit' from the storm. Hopefully this is all that received the power surge.

Surge protectors are a necessary item, but in reality it takes an Expensive surge protector, for defense against a lightning storm, and even that isn't a sure bet.
(Lightning strikes can produce over a Million volts)

Also, I have had three surge protectors where just THAT receptacle was bad.

"Hmmmm, surge protector power on LED is lit. Printer has power, monitor has power, and router has power. Surge protector must be good."

NOT.
Just THE receptacle the computer was plugged into was bad.

Past this test, I would suggest diagnosing the Power Supply.

A) Test the Power Supply voltages

B) Use a KNOWN to be Good, Compatible power supply, for a test unit.

C) Buy a power supply, and replace it.
Granted, not a professional approach, and could result in a waste of money.
Some do approach repair in this manner, however.

Going backwards.

C) The Gateway 504GR desktop computer uses an ATX style of power supply, and is rated at a maximum Wattage rating of 300 Watts.

(ATX case is approximately 6 inches Long, 6 inches Wide, and 3-1/2 inches Tall)

Gateway Support > 504GR desktop computer > Support Documents main page,

http://support.gateway.com/s/PC/R/3724/4365nv.shtml

If you Left-click on - Components, you will see a list of components used in the 504GR.
Scroll down to the heading - Power Supplies

Left-click on the blue -
102015 - 300 Watt Power Supply, heading.

It's just a generic ATX power supply with a,

1) 24-pin ATX main power cable,

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

2) 4-pin ATX +12 Volt power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

[ Power for the Intel Pentium 4 processor. Plugs into the motherboard ]

3) (1) SATA power cable

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

[Power for the SATA harddrive ]

4) At least two 4-pin Peripheral power cables,

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

[Power for the CD drive, and the DVD drive ]

This is just one example of a decent, reliable, economical Power Supply, that will fit the bill,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1389575&CatId=1078

B) The above explains the minimum Wattage needed for the test unit, the size, and shape of the case, and the needed power cables, in case there is a power supply around to use for a test unit.

(Some have an older unused computer sitting in a closet, or what have you. The computer can be temporarily cannibalized for the power supply)

1) That SMPS (Switched-Mode Power Supply) puts out three DC voltages.

A) 3.3 Volts
B) 5 Volts
C) 12 Volts

(Two C cell flashlight batteries produce 3 Volts DC)

The test is done for the 12 Volt power rail.
ALL Yellow wires in the various power cables, are 12 Volt wires.
They all go back to one 12 Volt power rail inside the Power Supply.

[Orange insulated wires are 3.3 Volts.
Red wires are 5 Volts ]

11 to 13 Volts indicates a good Power Supply.
Less than 11 Volts means it's time to replace.

You can use a multimeter to check the 12 Volt power rail, or a power supply tester.
One example of a power supply tester,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5250576&CatId=5471

An economical multimeter good enough for this test, can be purchased from $5 to $12.

The Power Supply is unplugged from power.
The Positive (Red) probe lead of the multimeter, is connected to ANY Yellow wire.

The Negative (Black) probe lead is connected to ANY Black wire.

(ALL Black wires are Ground wires. They all go back to one central Ground source inside the PSU.

{Power Supply Unit. Another term for Power Supply. Also another term for the SMPS, used in personal computers)

To reply just Left-click on Comment. (Believe upper right of your page )

Jun 20, 2010 | Computers & Internet

2 Answers

No power to my router


Check the wall outlet for power, using a lamp or such. If you can get a multi-meter, set the meter to Volts-DC between 12 and 20. Plug the power supply into the wall outlet and test the other end for voltage. The power supply should tell you its output so the reading should be more than a couple of volts. If it is less or ZERO the power supply is dead. If it has power, then open the router and check for a fuse. If the fuse is dead, replace. If there is no fuse or the fuse is OK then the router may be dead. Best of luck.

May 29, 2009 | Linksys Wireless-G Broadband Router

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