I have two motherboards, the first is the problem I'm wondering, fixed lights on ethernet, and nothing else works. Tensions, I checked, I did wrong, was not 0.5V , I saw confundi since 05.2 as I show in the picture. This motherboard comes him well all tensions.

The other motherboard, it was only to check the tension and I realized my mistake (this also have to repair) no lights in the ethernet and not connected to internet, so yes, starts and runs everything else

The first motherboard that a can further check? having all the correct voltages
Thank you

Okay, so you have on the motherboard all the main voltages, further no activity, only the two network leds are on.

What you can do is to check the C115 cap voltage for 3.3v.
This is the fourth cap from the four big caps, near the jtag connector (14 pins).
Is this present, than you can try to replace these cap.
Because, if this cap is bad, than you may get this symptom.

Further you can try to see if there is any activity by using a terminal program as Hyperterminal or Putty.
Use a 0 modem rs232 cable and connect it to the service port.
Use the terminal settings,

Bits per second = 115200
Data bits = 8
Parity = None
Stop bits = 1
Flow control = Xon / Xoff

If you have replaced this cap, or often better all the four big caps and you have no results, or any output data from the serial port.

Than it could be a u22 issue (if it's the seven pins version) otherwise it is most likely a cpu, or memory issue.

I checked the voltage is correct. proves the program has told me and put those values.

Hi Johnny

I tried the Putty, but in the Dreambox with fixed ethernet lights, do not connect me.
I tried with the other dreambox with lights ethernet go but the second off and I went out this data


(c) 2007,2008 Dream Multimedia GmbH. All rights reserved.
Dreambox DM800
FIRST STAGE 1.00 {BO23456}

2ND STAGE OK, build #76 (20100419)

0.000 - BCM board setup
{00000126,00000126,00000125,00000124,00000133,00000133}
0.007 - fp init
0.008 - ca init
SW != 9000
error in receive
error during t1 transfer
SW != 9000
error in receive
error during t1 transfer
SW != 9000
error in receive
error during t1 transfer
1.395 - load config
dCA: not existent, loading defaults
1.426 - config loaded.
* press [S] to enter setup
OLED found!
BOOT #76(20100419)
detected jffs2 blocksize: 16kb
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++++++++++++++++
dreamupd initialized
Scanning JFFS2 FS: . done.
/flash/bootlogo.elf
bootlogo size: 163059
using 1280x720p (60.00 Hz)
Using the Small jpeg decoder library, Copyright (c) 2006, Luc Saillard <luc@saillard.org>
parsing JPEG header..
JPEG Size: 1280x720
/flash/vmlinux.gz
<5>Linux version 2.6.18-7.3-dm800 (amedeo@localhost.localdomain) (gcc version 4.4.3 (GCC) ) #1 Wed Jun 2 18:15:26 CEST 2010
Fetching vars from bootloader... none present, using defaults.
board_init_once: regval=44ac6502, ddr_strap=3, 4 chips, pci_size=2
Detected 256 MB on board
<4>WARNING: read invalid MAC address ff:ff:ff:ff:ff:ff from flash @ 0xbffff824
Default command line =
root=/dev/mtdblock3 rootfstype=jffs2 rw console=null
1 831ffed8 8303c848
g_board_RAM_size=256MB
Options: sata=1 enet=1 emac_1=0 no_mdio=0 docsis=0 ebi_war=0 pci=1 smp=0
CPU revision is: 00020000
Determined physical RAM map:
memory: 10000000 @ 00000000 (usable)
---> memsize from bootloader: 148
User-defined physical RAM map:
node [00000000, 09400000: RAM]
node [09400000, 06c00000: RSVD]
<5>Reserving 108 MB upper memory starting at 09400000
<7>On node 0 totalpages: 65536
<7> DMA zone: 65536 pages, LIFO batch:15
Built 1 zonelists. Total pages: 65536
<5>Kernel command line: root=/dev/mtdblock3 rootfstype=jffs2 rw console=null
before init RAC 0x02a00000 0x00000000
after init RAC 0x02a0000f 0x0fff0000

in the first dreambox, I can see more?

Sorry for the late response, but a little busy today with the repairs

The terminal output looks to me fine, and what the network leds concerns,

Do you have this issue?
Network cable connected.. the two lan leds light up, then both off.

Like this..
http://jb8a8f8.com/support/index.php?attachments/2290-jpg.57/

Do not worry, we'll all busy

About DreamBox fixed in ethernet lights, as usual, it is not connected by putty, unresponsive. Tensions are all correct. Even the cap appears c115 me 3.3v voltage
There's some checking .... Is there a solution?

On the other dreambox, effectively lights on and off, I will check voltages

ThanksJohnny_B

The box which is completely dead, only the lan LEDs.

Check the ohm values of the P5, not the voltages, so do not connect the psu.
On this picture you see three rows of ohm values of three motherboards.
Check whether one or more has a different value.
All values has been measured between the ground and the measure point.

http://jb8a8f8.com/support/index.php?attachments/dm800hd-fault-finder-pinout-ohms-2013-jpg.23/

Thanks
Measure:
Pin 1... 99
Pin 2... 1117
Pin 3... 3241
Pin 4... 632
Pin 5... 1769
Pin 6... 980

Pin 4 fail?

Pin 4 issue?, no this I've seen more often while the receiver worked just fine.

The rest looks to me fine.

I think, replace the four big caps then there is a reasonable chance that the box again works.

then the dreambox with fixed lights in ethernet, you might be solved by changing the large caps ?, which are or which type you recommend replacing... 4700uf10v? Replacing four caps?