I recently replaced the mainboard because when I turn on the power the light would come on but no response from anything. Now the screen lights up, the drives start up and the fan turns on and off repeatedly. I went through and checked all connections again. I am out of ideas. Can you please help!!!
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Re: fan turns on and off rapidly
The fan cycling problem on the T23 series usually indicates a loose
solder or missing inductor which is usually on the underside beneath
the PCMCIA slot. If you replaced the mobo yourself you may have
flexed what is a weak solder joint loose - you will need to pull the
board and resolder this or have someone else do this for you. You
can sometimes get the laptop to start by flexing the assembled laptop
gently around the PCMCIA slot and if so then that almost always means
an inductor problem. You can find some photos by googling
(images) "T23 mobo" or "T23 motherboard".
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turn off the notebook. take a regualr desktop monitor VGA or LCD monitor and plug into the notebook (make sure to power up both the notebook with AC adapter and power cord for monitor). Turn both on and you should see video on the desktop monitor . if you do not see anything, i would hint at the fact that the notebook screen may be bad. Do you hear the hard disk drive spinning when you turn on the notebook ? if so, thats a good indication that the mainboard is still working and that the LCD screen on the notebook is not functioing . You will have to replace the LCD (notebook) screen
find out if the fan is blowing air -- tun notebookover and see if the air is blowing out from under it, while notebook is running. I would say that the heatsink fan may have stopped working, and it shuts down the computer as a fail safe response, so that the CPU or mainboard is not damaged.
other possibility, ---- the power connection (when inserting the AC adapter cord) may be faulty .to find out : remove the battery from computer (while computer is off). Turn computer on, insert the AC adapter cord. If notebook turns on, its fine -- if not and disconnects intermittently, you have a faulty AC adapter or power cord or combination/hop this helps
>>> Please leave feedback so I can continue helping You & Others Hi,
The middle blue led is the charging indicator, sounds like you have (at least) a bad battery, remove it, plug in AC and try again, if no good, remove the HD and repeat, if no good, remove/replace the ram and repeat, if still no good, your mainboard is cooked.
First, try and take out the battery and start the computer with just the power adapter. If the power adapter is still blinking, replace the power adapter. If the computer turns on with just the power adapter, replace the battery.
If the battery status light rapidly flashes amber, the battery may be defective. Purchase a replacement battery from Dell.
If the power supply status light flashes, the power supply may be defective. Purchase a replacement power supply.
This sounds like it may be a Power controller problem, (circuit that controls battery charging etc...) To fix this the mainboard usually needs to be replaced, which will mean that you will have to send it to SONY to be "serviced".
Easy solution is there : Check the fan with external power (12v. DC). If damaged replace it. Give a clean windows installation when the fan is OK. If your mainboard does not supply power to the fan than you have a major problem with mainboard. Replace mainboard.
first suggestion :
if some 1 with the same computer model can lend you his battery or ac adapter or both for a while u can then make sure if ur battery is ok.
get to the mainboard there is a jumper near the cmos battery usually shows the word (jbat) near it , try to change its position for some seconds while power is off , this way will clear cmos and set the mainboard bios to default settings. start the system hit delete or F2 to enter setup then exit saving changes.