samsung hpn5039 ax50p3 doesn't power up.

[Bob Neely]

Greeting,

I have this TV that will not power up.

I took the back off and check for the 5vdc stby voltage on the power supply at connector CN804 and the test point and I am getting 2.9vdc. The PS ON voltage is 1.6vdc on connector CN802.

When I use the power button on the side of the set I hear a click then a short fizzle sound next to connector CN804. When the TV is originally plugged in there is a red led on the front. When I push the power button it blinks 5 times then it goes out.

Here are some pics of the power supply.

Any help would be appreciated.

[Bob Neely]

Re: samsung hpn5039 ax50p3 doesn't power up.

Can anybody help. I would really like to get this off my table.

Thanks

[Bob Neely]

Re: samsung hpn5039 ax50p3 doesn't power up.

Changed power supply. Get stby 5vdc getting ps on voltage.
Checked
V5D- 5.3vdc .... 2.1vdc
VG- 15vdc.... 14.8 vdc
Vscan- 95vdc..... 78vdc
Vs- 88vdc..... No volts
Vest....126vdc .... No volts
Ve..... 115vdc.... No volts
Va...... 76vdc..... 78vdc

Can anybody help?

[Alastair E]

Re: samsung hpn5039 ax50p3 doesn't power up.

You have no Vs.....

Check for shorts on the Vs line. Try running with first Y-SUS disconnected from PSU, then X-SUS disconnected from PSU--See if the voltage returns at the PSU with either disconnected.

If not, then you probably have a faulty replacement PSU.

[Bob Neely]

Re: samsung hpn5039 ax50p3 doesn't power up.

Thanks Alastair E.

I did disconnected the X-sus and Y-sus boards after the post. No change. I guess the PSU is bad. I will look for the short on the VS line.

Anybody know where I can get the schematic for this unit?