boing1000
Posts: 56
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| 23 Jan 2008 7:32 AM |
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I see, this may be repairable so that the PDA is working in some way. It's not an easy thing because you will need the ROM Image file and do some time critical steps to enter the PDA UpgradeTool (blindly) and start the upgrade process.
Another questions to avoid waste of work and time:
Is the screen white blank, means you can not see anything but a 100% white screen?
What is the name of the device when you plug the PDA to the PC?
If the screen is dark black with no startup-sound at all, the upgrade procedure may not work.
Please tell me the condition, so I can more detailed help/guide you to restore the PDA.
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iondarie
Posts: 3
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| 24 Jan 2008 12:20 AM |
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the device is seen as Mio DigiWalker, the screen is black, it makes a weird noise that i dont even know if i should call it a sound.
if you want you can find me on yahoo messenger: ion.darie
thank you for trying to help
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SKYPEKID1
Posts: 4
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| 26 Jan 2008 9:05 PM |
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my Mio 168 (PIN 300) packed up after I accidentally held in the joystick whilst pressing soft reset. I have searched this forum for a solution but all I can get now is a white screen after pressing hard reset and joystick. My PC won't recognise the Mio now either.
Can anyone help me? |
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boing1000
Posts: 56
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| 26 Jan 2008 11:10 PM |
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{ at }iondarie
as far as I can tell, this is a bad condition. Mostly the device shows "only" a white screen but the start-up sound appears normaly.
The only thing I can guess is, that the flash rom was written wrong and now there is no working Bootloader nor operating system that can be execute propperly.
If you can also not access the Upgrade-Tool (switch off > hold the joystick button pressed (5th way) and switch back on), this device mist be restored via JTAG Flash procedure. It is a tricky thing, that I did not do myself until now. But a friend did it succesfully.
{ at }SKYPEKID1
Hm, accidentally this should never happend, but I take it as prompted.
Did you try to hardreset the device? Means switching off (backside hardware switch) and switching on again.
PS: This reset button is only a Soft Reset, like a reboot in Windows. Hardreset is switching off/on!
If this won't work, it may be that "you" (or something else) did reflash/overwrite the ROM with a wrong flash-image for another Mio168 device.
There are 2 different hardware known:
NEC Display > Reset button low left, a bit above the headphone plug
SHARP Display > Reset button high left, very close to the record key.
Both are NOT SWAPABLE! If done, one will get a white only screen but the device will work. Means the start-up sound appears and everything is working but with a white screen only.
Tell me what kind of device you got, then I may help you restoring the normal function of your PDA.
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SKYPEKID1
Posts: 4
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| 27 Jan 2008 5:47 AM |
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thank you for offering to help! It was my fault that the Mio went wrong, it has served me well for many years.
It is the Mio 168 manufactured Oct 2004 (aka Pin 300). It has the soft reset down by the headphone socket. A long while ago I had updated rom to Version 2.4.12.09-XMitac-C4PROD2.00000003729*76 and it worked well with GPS, even indoors.
Now, I can get the screen to light up (white) by flicking the hard reset button (backside bottom right corner), although this is not happening everytime. I hold the joystick button in (not right or left etc.) but screen stays white. No sound comes out and I can't get ActiveSync to recognise device on my PC.
I am keen to get it sorted as I have maps for Australia, New Zealand and Europe and these are not transferrable to another device. |
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boing1000
Posts: 56
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| 27 Jan 2008 9:22 AM |
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SKYPEKID1, I know this, it is a mechanical problem... called "Broken Ball" mostly under the ROM or RAM Chips inside the PDA.
This happens when the device was deformed machanical or had some hard contacts with the car holding station.
It can be fixed but the PDA has to be disassembled and the components must be resoldered with a special SMD-Flow material
to resolder the "solder balls" between the PCB and RAM/ROM chips.
Maybe you can find an elektronics freak or repair shop to let it fix up. |
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SKYPEKID1
Posts: 4
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| 27 Jan 2008 10:06 AM |
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thank you for the suggestion. I don't recall any mechanical hard knock? It was working fine up to the point where I tried a soft reset.
If you think I need to resolder components, can you point me to a guide on how to do it?
Thank you for your help. |
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boing1000
Posts: 56
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| 27 Jan 2008 9:11 PM |
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Perhaps the soft reset was the cause. maybe the pressure of the reset button or hand-holding was enough to let the even stressed "ball" break.
I had the same problem with my 2nd PDA and an older siemens cell-phone too.
This resoldering is not an easy thing. one have to heat the IC-Area up to 250-300°C and then let this SMD-Flow material (liquid addon) run/flow under the IC's. It is ok to do it on all 4 FPGA Chips (CPU, Flash-ROM and both RAM) to be sure all "balls" under this Chips have contact again.
Don't resolder the NEC Display Chip!
I can not advice you to do anything to your device!
I made this using hot-air device, somebody did it using an ofen with air flow (sorry I dont know the native english name...Im german)
do NOT(!!!) use Microwave, this will destroy everything!!!
When the PCB reached this temerature, the SMD-Flow material has to be added at the etch of each IC, it will flow under them and resolder the so called Balls. Please be careful and don't move any of this Chips out of it's place!
Let it cool down by itself without any mechanical stress. After this, the PDA should work again. The components can take that heat without damage, just some lables could loose contact or me unreadable after this (dont worry).
More help I can not provide. Just wishing good luck!
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SKYPEKID1
Posts: 4
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| 29 Jan 2008 5:49 AM |
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do you know of anyplace I can send it for repair?
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Mr_Gadget
Moderator
Posts: 2717
Location: Where else but Melbourne?
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denizkoekden
Posts: 1
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| 05 Mar 2008 7:27 AM |
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Hi,
I've got an Yakumo Delta 300 German and wanna repair it with Jtag because of Flashing Wrong file on it ...  .
Can andyboy upload all files i need? I prepared all Cables to Flash the PDA  .
There are just Deadlink
PS: I am German
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pashamangl
Posts: 1
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| 24 Mar 2008 4:20 AM |
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hello guys
i have a medion md 40600 (mdppc 200) and i try to put english rom on it(it have german rom) and unfortunatelly i select a wrong rom!now i have a beautifull black screen no sound at all and a R.I.P medion.din any of you find a solution to reflash blind a rom for medion?thanks in advance i wait for some good news on pm or directly here
thanks in advance to all |
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boing1000
Posts: 56
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| 28 Mar 2008 7:26 AM |
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sorry pashamangl, I think the only way to fix the PDA is to JTAG Flash a fitting rom image into it.
I can tell you it is a tricky thing!
You have to open the PDA, remove the cover over the CPU, RAM and ROM parts, connect 5 wires to very small (0.5mm) SMD resistors.
Connect them via 300 Ohms resistors to the parallel port (LPT) on your PC.
Also you will need the JTAG Flash Tool, its working in a DOS-Box and the rom image file.
I did once a soldering on a dead PDA PCB, it is possible to do.
More infos or tips I can not offer because until now I did never made a JTAG (re)Flash.
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jackson
Posts: 5
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| 02 Apr 2008 5:12 AM |
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Hello,
where I have to solder the mini cables in my mio 168?? I've already opened it , but the picture many posts ago is from another PDA  |
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boing1000
Posts: 56
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| 02 Apr 2008 6:23 AM |
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Hello jackson,
I only know of this picture: Mio168.
Otherwise you have another PCB or maybe not a "real" Mio168 clone.
My 2 PDA (1 NEC and 1 Sharp Screen) are loocking 100% the same as in this picture. Also I did a soldering
test on a dead NEC Screen based PCB at this tiny 5 SMD resistors. GND is only once necessary and must
not be one of this locations. |
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jackson
Posts: 5
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| 02 Apr 2008 7:26 AM |
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Thanks for the fast answer 
I cant see those things at my board ???
Here some pictures 
On the back :
Yakumo Delta 300 GPS
2004.06
should be one with nec display
I wanted to flash my 4.20 Windows version to Win 2003SE , but after those procedure i only got a white screen without the "boing" sound. today I borrowed the usb cable from my friend , but at windows i've get only an unknown device
sorry sorry, i 've found it... it was sooooooooo small, that i've overlooked it
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boing1000
Posts: 56
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| 02 Apr 2008 10:14 AM |
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- deleted -
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jackson
Posts: 5
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| 02 Apr 2008 10:31 AM |
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sorry, my english is bad
i tried to tell you that i cant hear anything, so i think i have to flash with jtag flash |
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boing1000
Posts: 56
Location:
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| 02 Apr 2008 10:54 PM |
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I am sorry too for reading you wrong!
This explain why windows can not detect the PDA right. In this case you need to flash with jtag.
Good luck after all 
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satcat
Posts: 3
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| 02 Apr 2008 11:02 PM |
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Hello
I don't own a device yet, but I am currently bidding for one on ebay, a MyGuide 6500 XL (Typhoon), which is the same as Mio 168.
Do you know if I can flash the device with a ROM from another device, for example flash the Typhoon with a ROM from a Mio, of course taking in account screen differences (NEC/Sharp). Or do I need an image from the same device (made by the same manufacturer) ?
I scanned the whole thread, but I don't think I found exactly this information.
Thanks in advance, I can't wait to get the device, will make a backup of the ROM first, and will put it somewhere in case there wasn't already (probably will be in German). I will want to flash with an English or at least a French ROM file.
Thanks |
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