Question about SuperMicro X7DB8+ Server Board - Intel 5000P - Enhanced SpeedStep Technology - Socket J - 1333MHz, 1... (MBD-X7DB8-B) Motherboard

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I need help for X7DB8+ MAINBOARD I GOT A MAINBOARD with some component missing from back side of board all of them are capacitor except L10 Inductor , but i am unable to get the specification / details of those component

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Could be in this manual

http://www.supermicro.com/manuals/motherboard/5000P/MNL-0832.pdf

Posted on Mar 16, 2011

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I have an Olevia Model #: 747-B11 P/N: FM1-047000E-S00 S/N: VLCD 79140278 Unit comes on gives you the Olevia screen than you get "NO SIGNAL" at the left bottom corner. Cannot switch SOURCE...


Hi Hernould,


First of all thank you for posting your question here at Fixya.com.


My first advice is to do system reset by unplugging the unit from the outlet(AC source) for at least 1 hour to refresh it and back to factory settings.


If the symptoms remain the same after the system reset, this is an indication that there's a faulty board inside. The symptoms you've described indicated that the T-con board, inverter board, power supply board, backlight of your unit is working but there's a problem on the mainboard that's why it display the words "No Signal" and unresponsive to remote control and front panel button key.


The mainboard has a lot of circuitry that has each functions. Suspected faulty circuitry on the mainboard are the Microcomputer, AV circuitry, I/O circuitry, EEPROM. Click it HERE for the mainboard replacement.


But before you replace the mainboard I would advice you to inspect the electrolytic capacitor on the power supply board feeding the mainboard. If one of the supply voltage is gone to malfunction, the circuitry on the mainboard will be disable. Check the encircled capacitor.





12_10_2011_12_02_32_am.jpg


Most of the faulty electrolytic capacitor has a physical indication of fault like bulged/dome at the top and can be easily identify through visual inspection. See sample picture below of faulty capacitor with dome at the top.




12_10_2011_12_04_44_am.jpg



Also, don't forget to check if your unit is under warranty period before an attempt to open the back cover, avail it because the manufacturer will fix it for free.

Please let me know if you need further assistance.

Rating and feedback are highly appreciated.


Have a nice day!

Good luck and take care!

Kind Regards,

Mjsazon

Dec 09, 2011 | Olevia LT37HVS 37 in. LCD HDTV

1 Answer

GE PROFILE PCF25PGSABB- Ice maker only makes water since the day we brought it home- Frig will not get colder 41 degrees.I have followed all instructions. Is the mainboard kit d/evap the Motherboard and...


Motherboards usually react to an outside problem like a defective fan or compressor start components failure. To replace the board without checking for a cause would be a very expensive mistake. You mentioned that this has happened beginning the day you brought the refrigerator home. Is this a warranty issue? I can help you find the problem but until the problem is fixed never replace the motherboard. A defective fan motor or defective compressor start components will take out a new mother board before you blink. Even so called service technicians miss this! They come to your home switch the board, get paid and bad board again.Let me know if you need my help, Thanks, Sea Breeze

Feb 20, 2010 | GE Profile 26.6 cu. ft. Side-by-Side...

1 Answer

Hi, my sega game gear has a very dim screen, what can I do?


A weakness of all Sega manufactured Game Gears is a particular type of electronic component used in various parts of the internal circuitry; the SMD (surface mount) electrolytic capacitor. Many years ago these components were a common cause of camcorder faults. Now, as Game Gears getting to be 15+ years old, they are suffering from the "bad cap's" phenomenon too.
The symptoms of faulty capacitors include:
  • LCD Screen only looks good when viewed at an unnatural angle (anything other than 90 degrees).
  • Bright parts of the picture create 'ghost lines' in the dark parts.
  • Screen looks washed out, dim, and lacking in contrast.
  • Turns itself off (in extreme cases).
  • Problems are alleviated when unit has warmed up a bit.
Further confirmation can be had by opening the unit and examining the board area around the capacitors. Faulty capacitors will often (but not always) leak their corrosive electrolyte onto the surrounding board. This is a clear, oily substance which can may attack the cap's legs and surrounding components, leaving a green corrosion behind.
6ada731.jpg
If one is faulty, the rest won't be far behind. Replaced them all at once!
These capacitors are glued and soldered to the board. To remove one, carefully rock it from side to side with a small pair of pliers until to feel the glue break, then desolder each leg from the PCB. When they're off, take the opportunity to clean up any leaked electrolyte and corrosion. Metho (rubbing alcohol to the Yanks) is good for this.
There are two versions of the Game Gear, the main difference being the main board layout. The later model also combined it's two ASICs (custom chips) into a single IC. There are other board layouts out there, if you have a Game Gear whose capacitor collection doesn't match the table send me a list and I'll update the page. Here is a list of all electro capacitors on the main board.
Mainboard
ONE ASIC GG TWO ASIC GG VALUE C68
C43
C45
C55
C54
C48
C49
C1
C4
C14
C48
C11
C31
C49
C35
C45
C44
C38
C39
C1
C3
C14
C48
- 100μ 6.3V
22μ 6.3V
4.7μ 35V
0.47μ 50V
0.47μ 50V
68μ 6.3V
100μ 4V
33μ 6.3V
10μ 6.3V
10μ 6.3V
10μ 6.3V
10μ 6.3V

Audio Amplifier Board
DESIGNATOR VALUE C1
C2
C3
C5
C7 100μ 6.3V
100μ 6.3V
100μ 6.3V
47μ 4V
47μ 4V
Some things to consider when shopping for replacement capacitors:
  • Replacements should have the same capacitance (in μF - micro farad) and the same or higher voltage rating.
  • Standard RB/Radial (both legs poke out from the bottom) electrolytic capacitors are fine.
  • Sub-miniature types are even better.
  • If you cannot find the correct value then connect two small caps in parallel. Tolerance is typically +/- 20% so no need to be too precise. E.g. 47μ // 22μ in place of a 68μ value.
If you find the sound from the internal speaker to be missing or distorted then a faulty C7 (47μ) on the audio board is the likely cause. If there also distorted audio on from the headphone jack then you many need to replace all capacitors on the audio board.
Capacitors on the power supply board are generally reliable, not being of the surface mount type.

Jan 10, 2010 | Sega Game Gear Console

1 Answer

My r.c.a d52w20 rear projection shuts on and off by itself.


Hello james,

The problem happens to be a capacitor. your TV uses the ITC222 Thomson chassis and it has a flaw in which CP150, CP140, and CP120 dries out and then explodes or becomes bloated and causes the problem you are reporting. Here is a URL to get the schematic daiagram:
http://www.eserviceinfo.com/downloadsm/3692/Thomson_ITC222.html

Once you have the schematic, the actual component is on the Deflection board (the one on your right hand side facing the back of the set. The component is behind a heat sink with a transistor on it. Now make sure you find all three capacitors (the two other are on the same deflection board).

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Jun 27, 2009 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

No pwr


the flashing red light is caused by a burst or bulging capacitor on the power supply side of the dvp642's mainboard.
to fix it simply dis-assemble the unit removing the mainboard totally from the casing. search for the bad capacitor on the main board. once you have found it simply turn the board over and using a soldering iron and some desolder twine desolder the capacitor from the board being careful not to burn the circuit board or lift any traces.once you have removed the old capacitor take it and purchase a replacement from radioshack or equivalent store. make sure the replacement has the exact same voltage rating and AT LEAST THE SAME AMPERAGE higher is ok lower will not work.but the voltage must be exactly the same. resolder the new capacitor to the mainboard and reassemble and viola your up and running again

Mar 29, 2009 | Philips DVP642 DVD Player

1 Answer

Philips 190G -> http://www.cnet.com.au/i/r/2006/desktops/monitors/22139625/Philips_190G6FB-97_c.jpg


My solution:
Open the monitor. Take off the mainboard. There´s a supply board for the backlight under it.
Replace the two purple capacitors (150uF/25V). These are from a bad batch.

Also replace fuse F1 (lightbrown SMD-component) on the bottom of that board (near the long side).
It has blown as a result of the bad capacitors.

In my case the values were dropped to 25 uF. And the internal resistance (R) was more than 2 ohms.

That´s it. Hope it helped you.

Aug 18, 2008 | Philips 190B6CB/27 19" LCD

3 Answers

System won't power up


Hi,

Based on your description, we can limit the fault to the power supply board and in particular to possibly 3~4 components:
  • bridge diode;
  • filter capacitor (mains);
  • regulator;
  • filter capacitor (secondary).
blown fuse indicate a short in any of these.

As Jaime867 has suggested, in the absence of a readily available replacement board, component level might be the best alternative at the moment. Having posted the most likely culprits further narrows down your troubleshooting. Could you pls post back the part number of the smaller IC either 4 or 8 pins?

Alternately, pls check for the presence of a VDR, it would look like a coin (often green in color or something else) with 2 pins. They have been known to short out also and cause fuse to blow. One possible indicator is chipped or flaked of one side or a hairline crack on top. If it is chip, there would be a silvery color on the inside.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jul 26, 2008 | RCA RTD258 System

1 Answer

Daewoo DP42SM coloring missing blue tint on dvd playback only


I don't know are you familiar with electronic,if you are you can fix it by yourself.The problem is in video process board,the one in metal cage.What you need to do is to remove the board from the set,remove the cage, then to replace all SMD capacitors!!!And do not put SMD as replacement put the normal capacitors same values they can be fited.You should aslo replace capacitors at the PSU and check 170V,160V and 70V and adjust them after the replacement.PSU is easy part but the video board is tricky one but it can be done

Feb 15, 2008 | Daewoo DP42SM 42 in. HD-Ready Plasma...

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