Question about Avaya 1151B1 Power Supply Definity (1151B1R) Power Supply

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1.output supply is low 2.C11 needs to be changed regularly. 3. U2 is found blown

1.output supply is low
I have found output voltage is 5.0 volts, 6.4 volts,8.8 volts, 10 volts
in different units.

2.C11 needs to be changed regularly.
In many units this has to be replaced to make it functional.

3. U2 is found blown
Found this problem in about 14 units. Yet to be rectified.

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The red lightcomes on when i hook up things to it when nothin is hooked up its green

Usually, this indicates an overload condition. I have a Pyramid 35 amp supply that has no green light but uit does have a red light and an irritating little beeper that the instruction book says is activiated when power draw approaches 90% of rated output. (Why not call it a 30 amp supply if you can't use the full 35???) Enough editorializing. You don't say if the supply actually works, just that the light changes color. If it doesn't work at all, I would start with checking the diode bridge for a blown or leaking diode. If one is bad, it can output enough to drive an LED but fail anything else. If these are good, check the filter capacitor. If this is bad, the hum could concievably confuse the regulator circuit. Next, I would check what ever voltage regulator it has in it. I can't comment on specifics as there are many schemes that can be used. My unit, for example, is like a mouse driving an elephant. It has a small 723 regulator IC, (Aprox. 100ma output), controling 4 large TO-3 pass transistors driven by a 36 volt 40 amp transformer to boil it all down to an adjustable 12 to 15 volts.
The bottom line is without knowing if the unit is puting out or not and not having it in my hand to look at, this is the best I can do. I hope it helps.
Good luck.

Feb 03, 2011 | Pyramid 10 Amp Power Supply (068888701655)...

1 Answer

I am trying to troubleshoot whether or not my ultra x2 connect 550 watt power supply is bad. When you press the power button on the computer, the light flashes and then noth9ing else happens. The light...

Well here is a way to check your power supply, on your hard drive connector using your volt meter and measuring from ground. this would be using one of two middle connectors it should measure +5 VDC on the red wire and + 12 VDC on the yellow wire. If these voltages are good then we got to see if the power supply is producing the -12VDC voltage. This voltage is ussed by the syustemboard on pin 14 of a 24 pin power supply. I would recommend not having your system board plugged in while measuring these votlages, but the power supply may need a load, I would plug in the cdrom.. Below are a couple of picture to explain this and a link to a website that has this documented.

dfish26_1.jpg The 24 pin main power connector was added in ATX12V 2.0 to provide extra power needed by PCI Express slots. The older 20 pin main power cable only has one 12 volt line. The new 24 pin connector added one line apiece for ground, 3.3, 5, and 12 volts. The extra pins made the auxiliary power cable unnecessary so most ATX12V 2.x power supplies don't have them. The 24 pin connector is polarized so it can only be plugged in pointing in the correct direction.
Pinout Pins 1 through 12 Pins 13 through 24 Description Wire color Pin number Pin number Wire color Description +3.3 volts orange 1 13 orange +3.3 volts +3.3 volts orange 2 14 blue -12 volts ground black 3 15 black ground +5 volts red 4 16 green PS_ON# ground black 5 17 black ground +5 volts red 6 18 black ground ground black 7 19 black ground PWR_OK gray 8 20 white -5 volts (optional) VSB +5 volts purple 9 21 red +5 volts +12 volts yellow 10 22 red +5 volts +12 volts yellow 11 23 red +5 volts +3.3 volts orange 12 24 black ground
Good Luck I hope this helps.

Nov 19, 2010 | PSA Ultra X2 Connect (ULT31851) 550-Watt...

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Can not get computer to power back up no lights on front o rear just little light on mother board have dell 8400

Bad Power Supply, sscorbett.

Usually you have enough power to light LED lights, (Like the harddrive activity LED light for add-in cards, that you see on the motherboard), and spin fans, but Not enough power to turn the Processor on.

Dell Support >Dimension 8400 > Service Manual

Technical Overview > System Board Components

harddrive activity light for add-in cards (SCSI LED)

The Dimension 8400 comes with an ATX style of Power Supply, that has a maximum rated Wattage of 250 Watts.
1) ALL of the LED lights combined 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.

Your Power Supply just has enough power to light that LED light.
Weak voltage power rail.
Replace the Power Supply.

[ There are three power rails inside that SMPS.
Switched-Mode Power Supply.

1) The 3.3 Volt power rail
2) The 5 Volt power rail
3) The 12 Volt power rail ]

The ATX form factor for a Power Supply refers to the size, and shape of the case, for one.
Approximately 6 inches Wide, 5.5 inches Long, and 3-1/2 inches Tall.
The ATX power supply case in the Dimension 8400 however, is shorter in length.
It is 4 inches Long. (Depth)

Not an advertisement for the website, nor manufacturer.
Reference for the case size, and power cables needed,

Scroll down to see the connectors of the various power cables needed.

You may have a Power Supply with these dimensions, and needed power cables, in an unused computer.
Perhaps someone has upgraded to a better computer, and has an unused computer that you can temporarily borrow the Power Supply for a test unit.

Make sure it has at least 250 Watts (Maximum rated wattage), plus,

1) 20-pin ATX main power cable. (Or a 20 + 4-pin ATX main power cable)

[ 20 + 4-pin ATX main power cable, ]

2) 4-pin ATX +12 Volt power cable

Plus the various power cables needed for the Harddrive, optical drive/s, and computer case fan/s, if it/they do not connect to the motherboard.

Oct 21, 2010 | Dell Dimension 8400 power supply ** FREE...

1 Answer

I have a Sony VAIO VGC-RB43 desktop with a Bestec ATX-300-12EB3-Rev.S3 power supply. The computer will not power up. The fans will not come on. Measuring DC volts on pin 9 (purple) of the mother board ATX...

Open the power supply case (be careful due to high voltages within the power supply) and look for swollen (tops are domed) or burst capacitors (tops have cracked open due to excessive swelling and the electrolitic fluid has leaked out). We have found this to be a regular problem for systems that have been running constantly for a long period of time. Also, look at the power caps on your mainboard (big ones nearest the CPU) and check for swelling or bursting. I just had tis issue with a Sony Vaio in that the caps in the power supply had started to swell. The system continually rebooted. Have seen the caps on MB's burst as well.

Jun 23, 2010 | Sony System Power Supplies

1 Answer

Lambda ews600-18 voltage goes down.

there is a short circuit protection and overoad protection to smps so o/p capacitor may short or secondary diode may short .so check voltage at primary when switched off after 33seconds whether switching process is going or not for that check dc volt at i/p capacitor then check volt at collector of transistor if metr shows 1digit then switching is going if not then meter shows full dc volt check component near about that

Apr 13, 2010 | Lambda 40-Watt Power Supply

2 Answers

Where is the fuse inside the power supply model fsp200

The unit is only 200watt and the fuse cost about $2,Thats if there one built into it,
The replacement power supply is about $20-00 NZD
Probably 20minutes to fix (for a novice) depending on their skill level and tools available,

BEST ADVICE Replace it

Power is something you dont want to mess with because it can kill.
The power packs are replaceable but people arent.
Be very careful and dont mess with the power.

I am an Electrician and I respect power.Misterdj

Mar 24, 2010 | AOpen (FSP200-60SAV) 200-Watt Power Supply

1 Answer

The LED on my HIPRO D3057F3R power supply is illuminated but the fan does not run. Does this mean that the power supply is bad?

Yes, it does.
More than likely Electrolytic Capacitors, have gone bad in the power supply.

Electrolytic Capacitors are used in the Input, and Output stage of the HiPro power supply, as Filters.

In the Input stage they filter the incoming AC voltage.
In the Output stage they filter the rectified AC.

(AC is rectified into DC. The capacitors are filtering DC at this point.
AC = Alternating Current
DC = Direct Current
A flashlight battery is an example of stored DC)

The HiPro power supply you have produces three main voltages. Three voltage Rails.
A.3.3 Volts
B.5 Volts
C.12 Volts

When Electrolytic Capacitors go bad, or are failing, there is a weak voltage rail.

HiPro power supply's are cheaply mad.
1.The wiring is too small. (The gauge of the wire is below standards)

2.The Electrolytic Capacitors are of low quality.

3.The rectifier bridge has cheap diodes, and too small of a heatsink.

I could go on, and on.

When you have a power supply with a weak voltage rail, there is not enough power for the Processor.

1.ALL the lights use less than 1 Watt.
2.EACH fan uses 2 to 3 Watts.
3.A typical Processor can use 55 to 125 Watts!
[Depends on what processor it is.

This is why lights - light, and sometimes fan's will spin, but the computer won't run.
Not enough power for the Processor.

Replace the power supply.

Viewing this link,

,you can see the HiPro D3057FR3 power supply has just the usual ATX shape, and size.
The ATX 'Form Factor' power supply, is used in approximately 90 percent of computer towers.

[Form Factor usually denotes towards a motherboard. An ATX form factor motherboard is 9.6 inches by 12 inches. Form Factor means the size, and shape.
The Form Factor designation, has been used towards certain hardware parts in a computer, as well as the computer case, but this is erroneously used. It does make it easier to identify with, though. That's why I used it here]

Point I'm getting to?
1.See if you have another Known, GOOD, ATX power supply to use for a test. Test my statements above before you go out, and buy another power supply.

Do you have another computer that has a good power supply, but may have other issues, that you can borrow the power supply out of, to use for a test?

Another thing. This manufacturer overstates the actual rated Wattage. The actual wattage is more like 70 percent of what is stated.
They state 300 Watts - Maximum, but in reality it is more like 210 Watts.

It is for this reason, and the reason that components used in the above power supply are cheap, that I would recommend buying a different power supply, than buying another HiPro.

(Therefore,.NO, I do not recommend the one in the link above, as a direct replacement)

What power supply that fits your needs would I recommend, that is a decent quality power supply, and won't break the bank?

This one,

OCZ StealthXStream 400 Watt.
Because it has 80 percent of the true rated wattage.
320 Watts actual.
Because it is reliable.
Because it has all the power cables you need.
Because it is $28 USD after the rebate.

I'm sticking my neck out recommending a particular power supply here, as this goes against our TOS, but if you have no background in this area, how are you going to know what to look for?

I am not recommending the website. But I have used them repeatedly, and always to my satifaction.

Any questions?

Nov 27, 2009 | Hi-Pro (HPP303W) 300-Watt Power Supply

3 Answers

Voltage regulator

One of the most common type is the 3 pin - 1 amp voltage regulators in a TO-220 package, they are the 78xx positive regulators and the 79xx negative regulators. The xx denoted the voltage output of the regulator.
I don't know what type of regulator is used in the APN 6003, if you can obtain a circuit diagram it might help you.

Sep 27, 2009 | Motorola System Power Supplies

2 Answers

Emachine t2245 - won't start - suspect power supply

It would be a rare incident to have a dying supply cause damage to the board, which is however, not to say that the reverse can't happen; i.e. you could replace the supply and still not have a working unit.
About the only thing you might do is note the position of the individual leads and colors on the main connector, forget the other ones, and measure from one of the ground pins (always black) to each of the other pins, noting the resistance values you find. If you are lucky, the supply may have a chart crossing the colors to voltages; unfortunately they are sometimes not there.
The 12 volt board contacts (+ & -) should measure fairly high (50-1k Ohm or more) the 5V can measure pretty low without being a problem, could be in the 5-20 Ohm area; this is a high current output. Unless black (to black), none of the leads should measure in the tenths of Ohms on the lowest scale.
Since there have been some changes in available outputs and connectors even on ATX supplies, make sure you compare pictures of the supply to your own but in any case, I would recommend using a replacment rated at 350W as this will run more conservatively and not be as stressed as the 250 you now have. It won't cost a lot more and will not consume any more power but the critical components will run cooler.
Not as a recommendation, just a current example on eBay:|39:1|66:2|65:12|240:1318&_trksid=p3286.c0.m14
The last couple I bought were $5 each with $7 shipping charge from a US source.     

Sep 19, 2008 | Bestec (ATX-250-12E) 250-Watt Power Supply

2 Answers


Maximum output of any smps is not based solely on the type of power switching transistors used. One of the parameters which will be crucial is the Ic (Max collector current rating). But this by itself isn't the lone determining factor either.

Other design factors which will come into play are the switching transformer, its size and windings. A smaller transformer and smaller wire gauge windings will generally mean lower max power output.

Max power output measurements probably require a set of load resistors, volt and amp meters, monitoring the 3.3, 5, 12 volt lines.

I'm not an engineer, but have had numerous computer power supplies apart, repairing some, junking some. Quality of construction or lack thereof is generally obvious. PC Power and Cooling probably builds high quality units. There are plenty of cheap, low cost power supplies which frequently die after a year or two, sometimes taking a motherboard down with it.

Dec 21, 2007 | Compaq Refurbished 280WATT POWER SUPPLY...

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