VOGONS


First post, by aureal

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Hi guys, got a problem with my satellite pro 440 cdx/cdt which im hoping yous can help me with

When I press the power button the ON light comes on but the fan doesn't spin and nothing comes up on the screen. The hard drive doesnt seem to spin up either. The lights for power and the battery come on however (even before I press the power button).

I have tried discharging the machine by pressing the power button for a few mins with both the acadaptor and battery pulled out and also tried plugging in a external monitor in case the built in screen is dead.

When the hdd is removed am I still supposed to be able to see the Toshiba logo on screen and get into the bios?

Could a dead bios/rtc battery prevent it from booting?

The fan dont switch on but I dont know if its dead or disconnected because the latop has been opened before not by me.

Is the laptop supposed make any noises when it switches on like a beep cause mine never beep even with the volume rocker on maximum

Does anyone have the operating manual for this laptop (not the service manual). What button am I supposed to be pressing to get into the bios? the internet is telling me to press everything from esc to f4

Unforunately I dont have another laptop that has the same small ide connector to test the hard drive.

Reply 1 of 6, by chiveicrook

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Hi,
Unfortunately I do not have my 440cdt on hand but I'll try to help with things that I remember 😀

1. Toshiba still keeps downloads for these models, a bit mixed with more modern stuff but usable: https://support.dynabook.com/support/modelHom … 70&osId=3333621
Unfortunately the user guide is packed in an exe which is hard to run on modern machines (and 7zip can't unpack it).
2. To get into bios keep ESC pressed while turning the machine on, after a while it should beep and display something similar to "Press F1 to enter bios"
3. I remember having problems booting with the internal rtc battery dead and main battery removed.
4. If there are problems with HDD it might also not boot (some msata->ide adapters caused mine to hard-freeze with black screen) but it should boot with hdd removed. Best to remove HDD and CD drive or floppy drive in such case to test. Some combinations of HDDs refused to boot with CD drive in place for me.

Reply 2 of 6, by BitWrangler

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Did you try booting from AC only no battery? If that works, try leaving it for a long time turned off with AC connected and battery in to see if battery recovers enough. Sometimes they seem to get over discharged such that they suck too much current to let the PC boot... or have developed an irreversible fault which does the same.

Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.

Reply 3 of 6, by dekkit

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I have a 440cdx that experiencing this exact same issue.

My situation
- have video of it booting fine (before i bought it)
- as soon as i took it home, ripped out main
Large battery, removed Rtc.battery and sub-battery.
- Cleaned up tiny amount of corrosion on internal battery socket , (inside condition looked very clean)
- Very minor handling of system, just moved keyboard to get to pins.

Now i get no boot, no beeps, no post, no memory check.

Whats concerning is this was working fine!

Things ive tried:
- printer port loop back plug thing (used on other toshibas to remove passwords) = no work ...didnt do anything to rekick bios.
- unplugged all hdds /cd rom = no difference
- try mashing or holdimg the reset button while powering on = nup no joy.
- random mashing of FUNCTION keys while swearing obscenities (hold esc, or f1 or f2 etc) = nothing
- evem restoring the batteries (all 3) = nothing.

This is all i see:

IMG-20220327-WA0013.jpg
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IMG-20220327-WA0013.jpg
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87.36 KiB
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151 views
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CC-BY-4.0

Is there another way reset any bios eeproms or anything that will factory reset this.

I suspect there may be a hardware profile in some eeprom somewhere that maybe causing a conflict...but i really dont know (or ive popped a fuse somewhere)

Its only occurred after removing batteries. Other vintage toshibas just ask you hit f1, after doing the same - which is why this one has me stumped.

Reply 4 of 6, by chiveicrook

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A quick test I came up with during my problems with 440cdt: Does function key light turn on when you press the fn button?
If it does -> software, bios or display issue, try plugging in external monitor
If it doesn't -> hardware lockup, won't be easy to diagnose. Check for shorts on hdd connector.

And a silly question but necessary to ask 😀 are you sure there are no beeps? the volume knob controls their volume as well

Reply 5 of 6, by dekkit

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chiveicrook wrote on 2022-03-27, 11:16:
A quick test I came up with during my problems with 440cdt: Does function key light turn on when you press the fn button? If it […]
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A quick test I came up with during my problems with 440cdt: Does function key light turn on when you press the fn button?
If it does -> software, bios or display issue, try plugging in external monitor
If it doesn't -> hardware lockup, won't be easy to diagnose. Check for shorts on hdd connector.

And a silly question but necessary to ask 😀 are you sure there are no beeps? the volume knob controls their volume as well

- no key light turns on when pressing the fn button (or any keyboard leds for that matter, when powered on - even checked the keyboard ribbon connector and gave it a scrub with iso)
- have tried an external vga monitor to see if i could at least see something (anything actually!) - i might add that trick worked for another different model vintage toshiba laptop but unfortunately not this one 🙁
-I've previously tried completely removing the hdd (but will need to have another closer look at the socket to see if there anything shorting it).
- and good silly question, yeah i've pumped that sucker up high but nothing i can audibly hear - system appears to have halted almost straight away.

I think the next step is to strip it right down and rebuild, but hoping to avoid that with some magical button sequences.

Thanks for the insights, hopefully one day it will play on.

UPDATE
- while pulling out the keyboard again, scanned around for any loose cables and had a look at the pcb ribbon cable- i noticed quite a bit of corrosion build up on the ribbon edges (quite dark on some pins) - cleaning the keyboard / tracker button ribbons with rubbing alcohol (iso) cleaned a fair bit of contact corrosion off on the cotton tip.

Suspect the other ribbon cables to be just as bad. Im hoping its just a case that i may have unsettled one or two when removing batteries and just need to find and clean any i find.

Reply 6 of 6, by dekkit

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Also if I've fried something (i.e. when pulling the RTC and sub-batteries out) would anyone have any suggestions on what PCB components typically go on this era of Toshiba laptop (fuses, moffsets, etc.)?

Keen to only strip it down once, so making a checklist of things to test before I start.