SAMSUNG UE46D5520 rebooting

[finntricky]

Hi guys
had a few of these samsungs come in with the same fault,
plug it in and boots to samsung logo, then turns off and starts again,
now from what im lead to believe is that the nand chip has corrupt software from an update, and replacing this chip will solve the problem,
so i got a chip from ebay, that says programed with updated software,
installed it, and still the same happens,
is there any other steps that i have to take or do ?

[vinceroger69]

Re: SAMSUNG UE46D5520 rebooting

does it boot up fully if you disconnect the tcon board?

[nomoresonys]

Re: SAMSUNG UE46D5520 rebooting

See if you can do a factory reset, I believe you hit: info-menu-mute-power to get at the service menu, be very careful in there, you only want to do factory reset for now, to see if it will clear up the issue, probably under options-factory reset.

[nomoresonys]

Re: SAMSUNG UE46D5520 rebooting

Another thing to try: go into regular menu/system/support/remote management-set to off.

[finntricky]

Re: SAMSUNG UE46D5520 rebooting

does it boot up fully if you disconnect the tcon board?

no idea m8, have'nt taken this one apart yet, but the 32 inch one is the one i changed the nand on, and that did'nt fully boot, still turned on and of within 30 secs with the t con disconnected.

[finntricky]

Re: SAMSUNG UE46D5520 rebooting

See if you can do a factory reset, I believe you hit: info-menu-mute-power to get at the service menu, be very careful in there, you only want to do factory reset for now, to see if it will clear up the issue, probably under options-factory reset.

done that, but just don't get enough time to get to the point of the reset, before it turns off again, tryed loads of times

[finntricky]

Re: SAMSUNG UE46D5520 rebooting

Another thing to try: go into regular menu/system/support/remote management-set to off.

don't get enough time to get that far, even if i manage to get the menu up

[vinceroger69]

Re: SAMSUNG UE46D5520 rebooting

does the nand ic do everything on these sets or is there a 8 legged ic that holds some data too.

[nomoresonys]

Re: SAMSUNG UE46D5520 rebooting

Might not be possible but I wonder if you could do it with a flashlight or does the picture go away completely?

[budm]

Re: SAMSUNG UE46D5520 rebooting

Inspect both end of the connector of the cable that goes between main board and power supply board to see if any part part of the connector has brown stain from over heating or not.

[finntricky]

Re: SAMSUNG UE46D5520 rebooting

does the nand ic do everything on these sets or is there a 8 legged ic that holds some data too.

yes there is an 8 leg chip, and tryed to reset that as well, but made no different s to the way the tv was acting, except it now comes up with no channels installed,and then shuts down

[vinceroger69]

Re: SAMSUNG UE46D5520 rebooting

so that may of reset it to factory settings (first plug in screen ie choose language and tune channels etc) reading a few threads usually changing the nand solves this issue is it possible you got a bad nand replacement

[finntricky]

Re: SAMSUNG UE46D5520 rebooting

dont get choose language, just samsung logo, then no channels installed, then shuts down and reboots again, i have ordered a few nand chips, from a different supplier, just in case it was a bad one that i got the first time, only time will tell, but if someone has the firmware for the 8 leg chip, i'll reflash it and see what happens, can't seem to find it anywhere,
i have the 62 meg update file from samsung site, but without the tv staying on, i can't use that from USB

[vinceroger69]

Re: SAMSUNG UE46D5520 rebooting

dont some samsungs rewrite there own data back on to the eeproms i remember on some samsungs you could fit a blank new one what mainboard number is used in this set

[finntricky]

Re: SAMSUNG UE46D5520 rebooting

BN41-01660A BN94-04465W i believe,

[finntricky]

Re: SAMSUNG UE46D5520 rebooting

UPDATE,
after having 6 different NAND chips from different sources, all resulted in the same outcome,
the tv never went any further than it did to start with, or the tv would not boot at all, so i have now given up, it looks like the only way i will ever get this tv to work , is to replace the main board with a working one, so if anybody has one hanging about, let me know please, or i'll just gumtree the thing for spares or repairs.

[nomoresonys]

Re: SAMSUNG UE46D5520 rebooting

.

[vinceroger69]

Re: SAMSUNG UE46D5520 rebooting

un bricking ic1901
https://wiki.samygo.tv/index.php/UnB...M_.28EEPROM.29

[finntricky]

Re: SAMSUNG UE46D5520 rebooting

tryed that as well Vinceroger69

[nomoresonys]

Re: SAMSUNG UE46D5520 rebooting

Head scratcher, unless your firmware is wrong or your preparation of the chip is off somehow or your programmer?