I have LG dryer model DLE 7177 RM my dryer has power indicated by the drum light but nothing else has power except the drum light, what might cause this

There is a upper limit and lower limit thermostat I believe, YouTube repair clinic channel has all the test info and parts.
https://www.youtube.com/user/RepairClinic

Also check the vent. It is trying to tell you there is no air flow.

Most likely cause is Timer.

Check the power to the display panel after you have it removed. If there is no power check the lines to the control, If the power is present with no action on the panel then you will have to replace the board. It may be as simple as cleaning the board off, since it has been a intermittent problem in the past. hopes this helps Tim

What happens on timed dry?

Hi,
If you have a gas dryer...
The most common problem with a gas and no heat is the ignitor going bad...

Here is a tip that I wrote about that problem...

http://www.fixya.com/support/r4398592-gas_dryer_not_working_gas_dryer_not

If your dryer is electric..
There could be a number of different problems...
Check out this tip that I wrote about this problem...


http://www.fixya.com/support/r3866345-dryer_troubleshooting_electric_dryer_won

heatman101

A piece of clothing is probably caught in the blower wheel.
Remove lint filter.
Use flashlight to look into filter housing to the lower left.
You may be able to retrive the item if you can see it.
Try rotating the drum in both directions while looking.

Your problem sounds like drum rollers have flat spots on them or in need of lubrication.
If you have a front loading machine, Unplug the dryer, remove the front of the dryer. This will expose the drum and belt, remove the drum and belt and this will expose the drum rollers.
Check your rollers for flat spots, if they have flat spots on them replace them.
If they don't then they probably only need lubrication. Lubricate the shaft of the rollers with a good grade of machine oil such as 3 in One oil. Reassemble the dryer, plug back in. This should solve you noise problem.
Good Luck,
I hope this helps

Try here
http://www.repairclinic.com/lg-washing-machine-parts?ctt_id=5201150&ctt_adnw=Google&ctt_kw=lg%20washer%20parts&ctt_ch=ps&ctt_entity=kw&gclid=CMv5x4zBx5sCFQJ2xgodeSfFAA

check to make sure that the power legs are correctly installed.  Use an volt meter and measure voltage across neutral and hot.  Hot leads should be on the left and right side and neutral is in the middle.  Hot to neutral should be 120v.  Hot to hot should read 240v.