Question about IBM eserver xSeries 205 8480

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We are using this server for more than 3 years. yesterday, server switched off due to voltage surge. afterthat it is not turning on. even smps not switching on..

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Sounds very likely that if the power supply isn't even showing signs of life then the surge has killed it, it'll need to be replaced. If your lucky then no other components have been damaged.

The supply in that unit (according to google) is an IBM 340W Power Supply - 24P6898. My searches have found a few refurbished units for about £40.

Posted on Nov 25, 2009

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Posted on Jan 02, 2017

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I Have An IBM x3400 How do i test the smps using a voltometer


Since you haven't mentioned the type of server its unsure server has single type or dual type SMPS. This issue can due to SMPS as well Plannar (motherboard) issue. But as per post i really doubt you have bad motherboard since you see BMC and other LEDS on motherboard gets blinking..

You can troubleshoot motherboard issue this way. Press and hold server power button. Check if this makes server start. If it starts, then its confirmed you have bad motherboard.. You may also inspect whether motherboard has bulged capacitors inside..

Thanks


Oct 05, 2012 | IBM x3400 Server

1 Answer

My hitachi plasma 42 PD7800TA does not turn on ,not even the standby ,the fuse is fine ,dont know what else to do? thanks Tony.


Hello
The power regulator board in your Hitachi is not switching. It is an SMPS [Switched Mode Power Supply]. Normally for plasma TVs the power supply repair will be almost impossibele due to lack of component availability. If the fuse is OK, definitley the switching process has failed it it. There is an IC which oscillates at high frequency, whic its oscillation signals are given to MOSFET transistors to chop the incoming AC, converted DC voltage. These switched voltage is passed through SMPS transofrmers which it turn generates secondary voltages that goes to different circuit boards of your TV. The power board is the most important section in a Plasma TV. it must be perfect in every respect in terms of secondary voltages. If any one of this voltage goes over than specified, the main boar will get damaged. So it is adviced to replace it as card basis, rather than making "sugery" to it. The power supply board can be had from Authorised Hitachi Service centers. You just give the the exact model number of your Hitachi TV. They will give you the orginal power supply board. Never play experiments with Plasma TV. OK.

Jul 15, 2011 | Hitachi PlasmaSync CMP4202U 42 in. HDTV...

1 Answer

Ive had this bluray player for 2 years and it was working fine, then one day i tried to turn it on and nothing happened. i checked if the fuse was blown but i appears to be fine. so there is no power...


hi,
there is possibility of two complaints.
1, The SMPS power supply fault
2. the mother board fault.
if the SMPS is faulty the you can rectify the problem. If it is with the mother board the you have to contact the manufacturer .
First of all you have to check the SMPS ( switch mode power supply). you have to check the voltages at it secondary stage. 5v, 12v, etc
switched-mode power supply (switching-mode power supply, SMPS, or simply switcher) is an electronic power supply that incorporates a switching regulator in order to be highly efficient in the conversion of electrical power. Like other types of power supplies, an SMPS transfers power from a source like the electrical power grid to a load (e.g., a personal computer) while converting voltage and current characteristics. An SMPS is usually employed to efficiently provide a regulated output voltage, typically at a level different from the input voltage
for checkin the SMPS voltaes you need a multimeter. And check the voltages at it secondary stage
Added the inside view of BD 1600
ajin_g_45.gif

if there is no outputs from the smps then you have to replace the SMPS drive STR ic near the big capacitor. Also ty to replace the OPTO coupler ic. y have to check the all resistors near the ic.

Remember one important thing that the capacitor can hold charge for some time even if you disconnect the power. so after removing the power. remove the SMPS very carefully. discharged the capacitor using a bulb.
i have also added a video for SMPS working for you reference will hep you for repairing your one

ok

Apr 07, 2011 | Samsung BD-P1600 Blu-ray Disc Player

1 Answer

A 37 inch insignia tv won't turn on after i plug my laptop for some music.then after unplugging my laptop it won't turn on.please give me best possible answer.( tv is about 2 years old)


This is the basic guide that can be applied to most LCD flat panel TV.

First, try unplugging it from the outlet for about an hour to see if the TV will reset itself since the minute the TV is plugged into the wall, the power supply and processor will be running 24/7 and the EPROM can get corrupted by spikes and surges. Try using good quality surge suppressor to see if it will help if it happen often.
Look for burnt brown hot spots on the circuit boards, capacitors with leaking/bulging top or seals. Loose wires and connectors. Blown fuses.
Notes: We are dealing with high voltage that can kill you! so if you are not sure what you are doing, please have it fixed by the pro that has proper tools and safety equipment. Try to use GFI outlet and isolation transformer when work around the TV set and DO NOT DEFEAT THE GROUND PIN OF THE OUTLET/POWER CORD.

1)The power supply module (There are 4 regulated output voltages:- Standby 5vdc, switched 5vdc, 12~16vdc, and 24vdc).

The power supply converts the 120/230vac 50/60Hz into DC, then the high frequency (50~100kHz) switching circuits convert it back to AC but at high frequency which allows the power supply to use smaller and much lighter weight transformers (Ferrite core instead of heavy iron core), then this high frequency AC voltage is fed to the rectifier Diodes to get the DC output and filtered by DC filter capacitors that must have low ESR (Equivalent Series Resistance), if general purpose electrolytic caps are use, they will fail within a year or less due to high ESR.

The power supply has Standby 5vdc (5VSB, this is a MUST have before anything else will work, when this voltage is not present, there will be no any indicator light on the front panel) which is always on the minute the TV is plugged into the AC outlet, so it is on 24/7 and that is why the power supply will fail even though you may use the a TV not very often. It will see all the voltage spikes and surges 24/7.
This 5vdc is used to power the Processor and the Infrared remote receiver module which will be waiting for the command from the remote control or from the power switch, when the Power on command is received, the Processor will send the turn on signal (3.3~5vdc) to the power supply module (PSON pin) to the switch on the main 5vdc for the rest of the logic and Tuner circuits, 12~16vdc for the sound amplifiers (mostly Class D amplifier for efficiency and small size) and for the T-CON board (interface board between the LCD panel and the Logic board), and 24vdc for the Back lights inverter board (if there is no 24vdc then no back light).
Common failures:
Blown main AC fuse due to shorted out Diodes, transistors.
Bad capacitors leaking or bulging tops:
Shorted Diodes, transistors in the DC output side.

Jan 31, 2011 | Insignia NS-LCD37 37 in. LCD TV

1 Answer

Why is my projector not switching on


Can vary from the fuse , surge protectors and possible compoents in the SMPS, the swittch mode power supply.
So use a meter to check for short inthe SMPS, if so check after suspectng on the rectifier, the filter capacitor or the OSC/DRIVER output. If not on the primary side and all voltagesare correct, then a short onthe seccondary side can switch offf the SMPS with the feedback current limiter. If so you will need to check one by one to disconnect and find the voltage build up to center on the fault.

Aug 31, 2010 | Panasonic Office Equipment & Supplies

1 Answer

My Toshiba satelllite A 305-S6905 System unit laptop just stopped charging , it does not switch on. only yesterday, it was working fine with no problems. it is just two years old .


Please check your battery for right voltage. if the voltage is down check the voltage in your adapter. If there is no voltage in the adapter then you might have to open check the continuity of the cord, normally this cord shorts and the adapter cutts off supply due to a high current error. So if there is shor tremove or other wise check the SMPS circuit for failed components, fuse, recifier, capacitor, driver. However if adapter works there must be supply at the battery terminal of the laptop, if not you have a failure in the charging circuit in the laptop. Hope you check this out one by one. Hope I could help. Good day

Aug 14, 2010 | Toshiba Satellite A135-S4527 Notebook

1 Answer

I had a power outage a couple nights ago, which has caused my television to not turn on. It is a Toshiba model CZ27T31, which was off & plugged into a surge protector at the time the storm knocked the...


Please check if your surge protector is working properly now. There is possibility that the surge protector is blown off due to high voltage surge. Check if your surge protector has a reset switch which some of the surge protectors have. If the problem still persists then you have to call the technician to replace the safety fuse which is inside the TV. The cost will not be much. I will personally recommend that you change your TV as it has outlived its life being 10 yrs old.

Aug 10, 2010 | Toshiba Televison & Video

1 Answer

HP Pavilion will not power up


Yes pwer in entering since the LED lights up but most probably your SMPS orpower supply has fried due to a voltage surge. Try replacing the Power supply unit and see if there is any difference(use a working SMPS for trial and if this works, you have the solution...........sodeep

Mar 30, 2009 | Computers & Internet

1 Answer

Not able to access from linux


just restart the server ,it will again connected.

Jan 10, 2008 | IBM DS4300 (25r0168) Hard Drive Array

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