Solved Fujitsu T4215 powers, won't POST, no display

August 7, 2011 at 16:03:59
Specs: n/a, n/a
First off, I'm in tech support, and I can repair computers.
But this has me stumped.

My 4215 won't POST. No beeps. Nothing on the Display/Screen (main LCD).

It powers on. A few of the correct Icons on the STATUS-LCD flash, like the HD, but THEN, the Scroll-lock ICON on the STATUS-LCD keeps flashing.

No beeps. Nothing on the screen.
And after a few seconds, the FAN runs at full speed, and continues at full speed.
So just the FAN and the flashing Scroll-Lock Icon on the Status-LCD.

I've tried Fn-F10 to change the display, but it doesn't do anything.
I've also tried Fn-F7 to turn up brightness on display, and Fn-F9 to turn up volume, hoping to see something or hear some beeps.

It does the same thing every time.
It does it with the battery installed, and with the battery removed and just on the AC.

If you know what the culprit is, then please tell me. In addition, I have some questions:

1) What does flashing Scroll-Lock mean?
2) Does this computer have flash or BATTERY-BACKED CMOS? Might this computer need a new CMOS COIN-style battery?
3) Is there a way to do a low-level RESET?


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August 7, 2011 at 16:41:11
✔ Best Answer
Apparently it's a netbook..
Fujitsu LifeBook T4215 Tablet (Core 2 Duo 2GHz, 1GB RAM, 100GB HDD)

Has this LifeBook T4215 been dropped ? Has it had liquid spilled on it ?

"1) What does flashing Scroll-Lock mean? "

I searched for: LifeBook T4215 flashing led

I found this ....

NoteBook Frequently Asked Questions

See the table of symptoms near the end of the page after this......

"32. My machine doesn't start - I have blinking symbols on the status display.
Newer systems do not use Beep codes. The error is coded by using 3 indicators."

You have a memory problem.

Try re-seating the ram module(s).

If that doesn't help.......

You can get oddball symptoms if any of the installed ram is incompatible. E.g., it won't boot normally, no video, no mboard beeps (when the mboard is capable of producing them).

If you're not sure if the installed ram is compatible, install at least one module that you can confirm is compatible with being installed in the model..

"2) Does this computer have flash or BATTERY-BACKED CMOS? Might this computer need a new CMOS COIN-style battery?"

As far as I have seen / read about, all modern laptops and netbooks have both a battery backed Cmos / bios chip, and a flash chip that can't have the user contents such as passwords erased by removing the power to it.
Generically, it may have a non-rechargable or a rechargable battery; it may be a coin cell battery or another type.

I've never come across or heard of ANY computer that failed to boot because the cmos battery was too weak or dead, but I suppose you may have oddball symptoms if it were shorted.

"3) Is there a way to do a low-level RESET?"

I have no idea what you mean when you say that, but I suspect NO.

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August 7, 2011 at 22:04:25

That chart of what the flashing icon's mean is exactly what I needed.
I couldn't find anything helpful when I was googling.
I guess I was being TOO specific, googling "Fujitsu flashing scroll-lock" with various other words. I could never find what the flashing scroll-lock might mean, and it wasn't in the manual.

That's really what I needed to know, and I've already made great strides.
Either my 2nd memory socket is bad, or the memory I have has decided to stop working in dual mode. Each will work by itself in the 1st slot. So I'll do some more standard methods of narrowing this down, but the computer POSTs with 1/2 memory so I'm on my way and shouldn't need to waste anymore of your (or anyone else's) time--THANKS for your help!

By the way, I wouldn't call this a Netbook. It is a 12" Notebook Tablet--it has a Wacom digitizer for pen input. Full size keyboard. Good size track-pad and buttons. Fully featured. A much more powerful processor, RAM, and HD than any netbook I've used.

I like the Fujitsu Tablet's a lot. I've owned several. And I want to get a newer one with a Core2Duo.

Although it's rare, a dead coin/Lithium battery can cause strange behavior in some computers...and many other hardware devices (such as music gear, like Keyboards, Synthesizers, Rack gear, Effects units, etc.). Simply replacing the battery can often take certain hardware from seeming seriously broken/malfunctioning, to perfectly working. I've only seen that 1 or 2 times with computers, though.

Thanks for your help!

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August 8, 2011 at 07:06:24
Thanks for the Thanks.

I use Yahoo to search with rather than Google - it has different priorties regarding what gets listed first, and I find it more useful for finding info about computer related problems. I usually don't use quotes around words when I search, unless not using them produces too many useless "hits" on the first page or two of results, and when I do use them I often do not use them around all the words.

Are the two ram modules the same ones it came with ?

If they aren't, are they identical ?

Ram slot circuits don't go bad spontaneously.
The only times I've seen a ram slot that has circuits that aren't working is when someone has installed a ram module backwards in the slot and then attempted to boot the computer, which instantly fries both the slot's circuits and the ram module that was backwards - physical damage can be seen on both where the contacts are, and there's often black carbon deposits in the slot.

It's also quite possible to damage the ram slot's circuits or the ram module or both if the user did not unplug both the AC adapter and the main battery with a laptop or netbook, or did not remove the live AC power to the case for a desktop, when fiddling with plugging in or unplugging ram. Otherwise, there are some contacts in the ram slots that are always powered even when the computer is not running.

Apparently you can install up to 4gb of ram, up to 2gb per slot.


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