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We received system problem with no display...then we replaced mainboard.after replacing it ,when i switch it on display is coming but it is splitted into six...BIOS screen also like that.... i replaced the mainboard two times..and i swapped the same lcd and cable to another system that it was ok..lcd ,cable and invertor card is good...motherboard also good....what will be the problem ? i think there is only supporting problem..can you help me

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If you go back to basics, it may show up the error.
Remove the hard drive connectors. Remove the RAM. Leaving a basic "empty" motherboard with just a video card or onboard video working, power it up. The mother board should POST. If it does, and ignore the BIOS whingeing that it has no toys to play with, I would say the mother board is OK.
Then add RAM and test again. Then add hard drives.
If the display shows multiple pictures, it is possibly set at the wrong resolution. With the machine basically working, now is the time to set up an 800X600 basic SVGA resolution. After that is should be a case of downloading the correct drivers for the hardware.
Hope that helps.

Posted on Jan 02, 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

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Hi Swithced my pc on and have no display. couple of days ago pc switched off by itself. New powersupply installed but problem still persists. please advise Regards A


It sounds to me that your computer mainboard is faulty.

I have created a published guide entitled My Computer is not turning on!!! Is it dead!!! No POST!!!
Note the section on clearing the BIOS/CMOS.
You could try replacing the silver 3V battery on your computer mainboard.

I think it may be a dead capacitor some-where on your computer mainboard, some technicians will replace it for you.

Thumbs up!
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The switch mode supply is working and the microprocessor is allowing the power to switch on but with errors.
The back panel must be removed so that you can start to check if the mainboard is receiving the +B voltage required for the switch on.
Check the 130 volt to the output ( LOT) if it is absent check if the driver is short or if hte LOT is short.
Remove the main lead and if the voltage comes up the LOT is faulty.
Order and replace

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if reconnecting the display doesn't help, and if replacing the screen does not help, then the phone is faulty, it needs to be repaired by a experienced professional, as the phone is too small and complex to be repaired at home in most cases.

in most cases the repairer will simply replace the mainboard to another one.

If you are outside of warranty, I might consider a new phone, if you are in warranty, use it.

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4) There is a small (i forget the exact term) ribbon of wires connecting the display to the mainboard that could be the problem; hence they said it is the mainboard. You'd be better off buying another system before you throw away your money into this one.

If you wind up getting another one, invest in a rubber skin or a hard-shell skin so that if it is dropped again, there should be no problem.

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